Im sure we will see some buffs/nerfs to classes as time goes on. The game has only been out for a week, give them time to collect some more data as people hit 50 and balance will happen. End game should be a DPS race, other wise as people have pointed out you just heal/tank everything. I know some classes are worse then others atm, but have faith that bioware will make changes.
Well at this point, I would much rather prefer they hard cap that you can only have so many healers/tanks in a group than make is a race till you insta die, it just really isn't fun, and this is coming from a dps class.