Bubble stun doesn't need a nerf

The fact is, I don't think there is a common ground or compromise to this ability. Having it on the caster only negates the lost abilities of going that high in Lightning. Increasing the resolve it fills will provide too much of a punishment and teams won't use the ability anymore. Changing the percentage so you never know if it's going to pop is too RNG based and will more likely than not get the sorc killed and have the invincible mara stunning people.

Having the ability trigger on the caster only continues to provide the protection that it was intended to give to the user. There just have to be some other changes made to other abilities in each tree or to shared abilities overall to make the class offer utility in some other way. I've mentioned options before, but perhaps changing something like force slow to a root rather than a snare could help with kiting melee classes and offer more utility in a more enjoyable way.

This is not correct, and it's bad logic to boot.

The spec was never a problem because the mez was unpredictable and usually broke on damage, essentially giving free resolve. Note that it was a 3 second mez with 300 resolve. Now it is a 3 second stun with 300 resolve. The resolve was not appropriately adjusted. This is a bug (one that Bioware is reluctant to fix to because they don't want to piss off sorcs again. Last time they got a justified nerf, all the lazy bad ones left the game because their class was no longer op - better for the game imho).

Anyway, the upshot of the broken resolve on the bubble stun is that the risk to spamming bubbles is very small compared to the reward. High chance to cause an aoe stun, small chance to cause white bars. But whenever anyone suggests fixing the resolve on it, someone always says, "But you will white bar the whole other team!" Yes you will, if you mindlessly spam bubbles. However, if you apply bubbles skillfully, with some actual thought, then it won't be such an issue.

Clicking off the bubble obviously needs to go as well.

And lastly, there needs to be a very obvious visual indicator that distinguishes a stun bubble from a normal one. I don't mind having to change my approach to a fight when I see a stun bubble, but I want to know if it's necessary.

I think it really depends how you do it, if you force speed to the middle of nowhere, then yes you prolly gonna get pulled or leaped. But if you do it when you are hugging a pillar or near one you have a very good cover to self heal and kite.

But think the issue here is not sorcs and more ops heals, I specially think that the free heal below 30% health is too op , would be nicer if it was a 30% chance of it not costing a TA or removing the self heal buff on the shield probe.

I can kind of see what you're saying. I've seen ops not pay attention to the status of my lockout bubble and laughed as the following happened:

1) Op opens with hidden strike when my bubble is up but after the lockout expired. I'm knocked down, he's bubblestunned.
2) I reapply bubble as soon as I get back up. Operative pops bubble, gets stunned again.
3) I sprint away. Op combat stealths, hoping to finally get his opener.
4) I manage to hide around a corner and elude the operative long enough for lockout to expire and for me to bubble myself again.
5) Operative finally finds me. Steps 1 and 2 repeat for a grand total of 4 consecutive bubblestuns on operative. Meanwhile, my team finally notices that I could use a peel, the operative already blew his stealth, and I point and laugh while operative gets splatted.

But.

I already must give up the AOE heal to get the root on knockback. Which I need very badly with the 3 or more melee hunting me down at all times, thank you very much. Without the root, the knockback is literally useless as melee can either leap back or simply walk back to me at full speed (no doubt while they have me either snared or rooted).

"But you have a slow!" Yes, but it is NOT aoe. It is not spammable, and it doesn't have 100% uptime like what some other classes get. If I have 3 melee on me, I can only slow one of them; my knockback is utterly useless against the other two without that root. This is why I said that other classes get their CC baseline, but sorcs must spec into theirs.

Meanwhile, there is practically nothing between innervate and AOE heal worth taking for PVP in the healing tree, and since I MUST get at least electric bindings (root) in lightning to have any survivability at all, I now have leftover talent points that are relatively useless when spent in heal tree, because there's not enough for AOE heal. So what's the only viable thing I can do with the leftovers? You guessed it, spec bubblestun.

If you want one less bubblestunner in warzones, give me the root on knockback, baseline, and let me go full heals while still allowing me the ability to kite (without those I'm trying to run away from leaping right back to me, cuz I have them rooted).

It really is that simple. We're expected to be the healing class that kites with speed, yet we have to stand still to heal. Therefore, we have to go hybrid so we can make our enemies stand still as well, and thus kite properly.

Get rid of the ability to be chain-rooted by multiple consecutive leapers, then let's talk about nerfing bubble stun.

Like you said, I didn't use it in my hybrid builds either, so you may be correct. The patch notes don't say anything about changing that particular aspect of the ability, however.

Backlash: The blindness effect caused by this skill no longer breaks on damage. The visual explosion effect now plays on the correct target.

Bubble stun is a bad ability that takes away the fun when everyone is running with one. Sage healers are fine, and it's scounds/ops healers that need some kind of nerf. The smash, pyro pts, tank/dps hybrids, broken tk tree, fluff damage of balance dps sages, etc are issues that have been discussed a gazillion times in a gazillion other threads with a gazillion suggestions and are tottaly separate issues from bubble stun. Just look them up.

because alot of the sorcs/sages will go full healing leading to the same situation as now - bubblestun canceled everywhere as it is now. the problem aint the fact that you can have it on everybody but beeing able to cancel it on your own stunning every one arround you.

This!
On my BH PT I simply look for the bubble and take my time to range pop it with either ED or RS. I see way too many people just head on attack everyone and get annoyed when they get stunned- it's a simple matter of patience and strategy.

You may be correct, in the notes it says:
Backlash: The blindness effect caused by this skill no longer breaks on damage. The visual explosion effect now plays on the correct target.

Maybe it did work on the target and not just on you, but the visual was incorrect. Either way, as a mezz, it didn't offer me any more survivability than the other tools I was specced into, so I left it alone. A mezz gives me maybe one extra second to get away if I'm lucky (what sorc being attacked isn't going to try to cast affliction on the attacker as they try to escape?)