Preface: I am a Vigilance Guardian melee dps
Last night in 16man EC, Kephuss fight, I received the bomb from the second trandoshan baradium bomber. I promptly ran under the mech, deployed my bomb, aaannnnddd died to the AoE damage under there. I then watched my guild down all obstacles, up to and including Warlord Kephuss himself, with only 15 people.
So, I gotta ask, what the *&$^ do I bring to the table?!? I don't do massive dps like the sentinels. I don't have Transcendance, or Inspiration. My supposedly heavy armor is little more than paper mache based on the amount of strain I place on the healers (and yes, I am a veteran raider, I know not to stand in fire).
TL;DR I am a purist who wanted to wield a single light saber effectively, but it would seem the game is highly slanted towards sentinels, and if you play a guardian you should have been a tank only.