Playing since 2 days, just a quick feedback what I don't like.
I love the game btw. so that's that. Here the points that bug me:
No scalable ui. The ui is way too big on my screen
No in game window can be moved. Customization is very limited.
No ambient occlusion (that makes me sad)
Shadows look crap and are already set to high.
Empty icon boxes (left and right bar) can't be hidden. (don't like)
Smart cam follow can't be turned off.
When I have the inventory and companion open it should compare the stats of the item with the companion and not with the player, or show both.
That are the points that really bug me, I am just level 10 so I don't want to give feedback on game dynamics. So far it's a lot of fun. But I am a very visual human being, I love nice looking things and swtor looks like a 5 year old game.