The thing is that SWTOR doesn't have DPS meters. So there's really no way for a DPS player to truly judge her performance. So we don't know if the enrage timers are actually tight, or the DPS players are simply not performing at a high enough level.
The variance between DPS can be huge. It's not like people are performing at 80% of theoretical max and they need to get to 90%. Very often, because of improper rotations and incorrect use of cooldowns, a decent player who isn't conversant with the best theorycraft might only be performing at 50% or less of the theoretical max.
And the DPS rotations in SWTOR are not trivial. I had a rotation for my Sniper that I was happily using. It seemed to be the best I could come up with. Then I went to sithwarrior.com and looked at their rotation. It was structured very differently than what I was using, and involved several abilities that I wasn't using. I switched, and I think my damage went up significantly.
Though, truthfully, because there are no meters and no combat log, I have no idea if what I'm doing now is better. It's better on paper, and seems to be better in game, but who knows.
Again, we hit a theme that I've hitting for years now. Good play requires feedback. Good dps requires feedback. And the best feedback for DPS is a combat log and damage meters.
But if you don't want damage meters, if you think they are detrimental, then you should not have DPS checks like enrage timers. Having strict enrage timers without meters strikes me as unfair to the DPS players.