Snohomie, I'm not sure what unplayable comments you are referring to. (Probably people just bitching that had craptastic video cards, I'm guessing.) It definitely wasn't optimized well until sometime in October; but it was fine as of whatever build it was that provided a considerable FPS boost. There was still the issue for a while after that where, if you ran multiple monitors in Windows, it would MURDER your frame rate; but that got fixed.
For sites to read up on, my favorite is http://www.darthhater.com
. Also: http://www.askajedi.com
Healing in this game is actually fun, in my opinion, Snohomie. I hated healing in WoW. They've managed to make it more interactive and fun in this game, IMO. If you're an Imperial Agent Operative healer, you have an energy bar similar to Rogues in WoW, but they added an interesting mechanic which really changes a lot of things in terms of efficiency, what you use and when, etc.; the first 3rd of your energy bar, it regenerates at a quick rate. Once you get into the 33-66% remaining range, the rate at which it regenerates slows down by a good amount. Then, if you're really pissing away your energy (I don't remember if it's called energy or not, though) and you get it down to the 0-32% left range, regeneration rate of it is way slower. It penalizes you for not being efficient. It really makes for an interesting mechanic. All the non-force classes have a mechanic like this with their main energy/heat mechanic. In WoW healer terms, I guess you could think of it as having a permanent innervate on you from 67-100% full energy, a half-effectiveness innervate from 33-66%, and no innervate from 0-32%.
Operatives and Mercenaries also get an ability that doesn't use any energy/heat that is a small channeled heal, which is intended to be used kind of in between casting good heals that actually use energy/heat. There are various tweaks that just make it more enjoyable than healing with any class in WoW, in my opinion.
@Dietrich: Sith Inquisitor Sorcerer on the Empire side, Jedi Consular Sage on the Republic side. Each side literally only has one caster. However, almost all of the non-force classes are ranged, so I wouldn't keep yourself locked into being a caster, honestly.