I agree with all of these posts, not being able to customize the UI is extremely frustrating. This should be high on the list of things to fix, I frequently find myself being throttled by this UI.
I mean, I made it my own to the best of my ability, it kind of works now for me, but even a blanket with holes in it will keep you warm on a cold night to a certain degree. After experiencing what good UI really is in other games, you never want to go back.
BioWare, PLEASE do something about this.