Sorry, but these questions are awful. There are no analytics backing up the questions. There's just speculation and guesswork. So why would there be several paragraphs of analytics responding to that?
Most of these questions are just pointless too. For example, on the Sentinel/Marauder PVE question, the top question was how come Focus/Rage with its AOE focus doesn't do as much single target damage as the other two trees. Are you kidding me? One is an AOE focused tree and the other two are single-target focused trees. So people are wondering why the AOE focused tree doesn't also do as much single target damage as the other two trees? Ummm, isn't that obvious? There would be no point to having the other two trees if Focus/Rage was on par with them in single target damage AND had it's AOE damage capabilities. With the Sage/Sorcerers, people want these healing classes to keep all of their heals and then also have all of the defensive cooldowns that non-healing DPS classes have? That's ridiculous. Why don't we just give them the best DPS too...and the best tanking ability. Let's just create one superclass that's the best at everything while we're at it. For Vanguards/Powertechs, people basically want the DPS spec to be able to do burst damage on par with a Sentinel/Marauder or a Gunslinger/Sniper. People want the heavy armor wearing AC to do the same burst DPS output as the medium armor wearing AC's? Yeah, that would work out well. Let's just give Vanguards/Powertechs under the DPS tree the full survivability of a tank AND give them DPS output on par with the best DPS in the game. I can't believe that these are the sorts of questions that made the cut as the best, most-important questions.
You are forgetting a crucial point. survivability for dps in both pvp and pve are more about the cds than the armour especially in pve. You wan't to survive the bursts in pvp until your team can help you and burst the attackers down. It' doesn't matter if you take less dmg over 5 min when the figths in pvp lasts much shorter. What you wan't for that is good cds with short cd, like cloak of pain.
For pve it's kinda the same thing but the cd of the defensive stuff is less important, its all about the potency. You need this for stuff were you have to take dmg(Kephess laser, kephess jump, twh adds, enrage/burn phases). Maruaders are extremly good at this today togheter with their high dps. I have seen several fights that was completed due to the fact that a maurder can tank the boss for 5-10 secs after the tank died. Usually if both tanks die the boss will go for the maurder due to their high dps which synergies even better. This is a also without losing any dps. A sorc can't just stand there healing themself and heavy armour won't do much that much but it do help.
I do agree that the rage/focus question was pretty weird, its obvious why it isn't single target. All specs need to have their speciality, usually burst, sustianed, aoe, heal or tank. I just hate to see BW bring up the old execute agument again. I really expected some math/logs from the devs to prove their point but atm a troll on fleet argues better than them. They just write "it is like this" without any sort of evidence or arguing at all. The sniper/maurder answers were atleast decent.