The longer queue times for dpsers is not role related problems! Why in WoW they dont have long queues? I guess you can answer this question by yourself.
I don't know where you been but I was on my leveling dps the other day on Taris and i was queued for 3 hours and not a single pop. DPS is harder to get because there are not as many tanks and healers as they are dps.
And the reason you don't have long times in WoW cause WoW has cross-server queues, TOR doesn't. But a flashpoint like this is desperately needed for dps that is leveling because unless your grouped with a tank or a healer you are going to be waiting for quite a while.