A lot of my gripes are with the PvP reward system, which they have already said they are going to fix in the new patch on Thursday. I am on a server where Imperials outnumber Republic 2:1, so they already dominated and already had a vast gain on us republic players in the gear battle. That being said, I still get my wins when I do premades with friends, but I think the diminishing returns, and some times no returns for losing is a huge bummer. But as I said before, they plan on fixing that.
Aside from that, was hoping for rated pvp already, really want to do 8 man ops. Balance still feels overwhelmingly in the imps favor, Sorc still seem to out-DPS sages, and marauders now do AoE crits on me for 4.5-6k+ damage with full BM heavy armor; so I'm really hoping they realize they need to change it.
I'm not happy, but I do like the new content, the new raid is fun and there are opportunities to grow, just really wish they put more thought into their class balancing. Maybe it's their better gear on imp side of my server, but they still hit like trucks compared to us republic players.