Though I usually play healers, I'm not particularly keen on special treatment for them (or tanks) to queue in this game. However, I think if Bioware adds in something like "dual spec" that allows people to switch relatively easily between two set specs (and quickslot set-ups), then we probably see a more healers and tanks entering queue.
As it stands now, most people will probably level and do dailies in DPS spec, so they have to redo their entire setup and spend a lot of credits every time they switch. It's too grueling (or just plain mind numbing) otherwise. Speaking for myself, it isn't worth the hassle to enter queue for some meager reward when switching and setting up quickslots is so much more expensive and annoying.