Prior to dual specs coming in this will remain an issue as anyone who raids or wants to PvP and tank flashpoints will have another spec they play. Not many people will be keen to respec 5-10 times a week just to tank a flashpoint and raid as DPS.
I think a big problem is that half of the classes that can go tank have a tank as their first companion. This pushes people away from choosing the AC that can tank in favour of the other, and then it is imposible to go back. And levelling another of the same class just so you can have the other AC is kinda painful ubecause you see -exactly- the same quests +/- like 10 that work differently for light/dark.
On Scepter of Ragnos, Ranged dps are impossible to find and proper Dps in general.
It is one big melee/lightsaber clusterfuck.
Plenty of healers and tanks - too many tbh; but that will chance as time goes by and the retard tanks realize they can't tank.
On my healer I want dual specc so I can switch to DPS for FP's, all I see in fleet general is LF1/2M DPS for HM's. This migh mainly bee because tanks/healers in general often group togheter.