The inability to speak Basic is one reason. Romances are another reason. Basically, if you have to be a perv to picture something kissing Leia or Han, it's unlikely to ever be playable.
You're actually not supposed to use all of them. Which ones you use depend on your spec. What's the bread and butter ability for spec X might not be very useful at all for spec Y etc. Some abilities that you unlock in the talent trees are supposed to replace abilities you learned from your trainer (ie Assault Plastique replacing Sticky Grenade due to them sharing cooldown).
I once played an MMO where the trinity could be totally and utterly ignored: Tabula Rasa. Group content boiled down to everyone whipping out their biggest, baddest shotguns and mindlessly mowing everything down as quickly as possible. Personally I found that incredibly boring.
They've all but confirmed that there'll be cross-server PvP queues. That considered, the addition of a cross-server LFG tool doesn't seem all that far fetched.
The only time I'd want to hear that annoying, sycophantic piece of crap speak would be while I was dissolving his sorry *** by slowly lowering him into a vat of acid.
They did it simply so that they could sit at the office, read all the forum posts about ****** looking gear and point and laugh at us because they hate us?