I'm sure pretty much everyone would be hard pressed to put up a million damage in even a full length void star. The recent thread where a Rage Mara did it? Even he admitted that it was a mystical aligning of the stars. You basically need an incredibly well geared and well played DPS with a massive spammable AoE that is nevertheless being constantly healed through by the other team, while you yourself have a set of good healers on YOUR team to keep you up.
Fact is I've never seen ANYONE do a million damage in any warzone EVER. Peak I've seen is a around 600k. I did in the high 500s on a full length void star on my commando once, and I saw a mara get close to 600k on a Novarre where south went a long time without being capped.
Fact is that as different as they are any sort of major DPS upgrade in PVP would probably unbalance things on the PVE side without a major rework. At least for gunnery/arsenal. Assault/Pyro might be a different story, if you just upgrade the burst, but I'd much rather see a talent to make Charged Burst proc plasma cell 100% of the time and a talent way up in the tree making it instant. See how those two changes (or just one of them, preferably the second) affect things before they go making big changes.
Your Facts are not Facts. That are your personal observations. The actual facts are that several different classes have put out over a million damage even prior to the 1.4 Rage buff. Mercs are middle of the line in DPS.
The Fact is that our burst could be tweaked without affecting PVE. A buff to HSM wouldn't affect PVE much since that's only 15% of total damage. Yet something like auto-crit and a 10% boost would be awesome in PVP.
You are right though. a buff to unload or tracer would cause PVE imbalance.