I dont actually "need" them, but I would very much like to have them. With 4 different cooldowns and buffs it would be nice to have 1 button to press to activate them all for example. Its not needed, but its faster and preferable.
I would also like damage meters so I could see if what I'm doing is utter crap or if I'm on the right track. I wish to improve my performance in flashpoints and operations and its hard to do so without meters feeding the info I want back to me.
I'd also want to be able to fix the UI, I'm a creature of habit and compared to WoW we have a lot fewer slots to put our abilities etc on.
Like I said, I dont "need" these things.