Played for a few hours last night, and did not find any problems at all.
Personally, I would not worry about the size issue. I like to have as much open screen as possible, while still seeing all the crap folks are sending me, and still trying to actually play...hahahahha.
Up to you if you wanna tinker with it anymore, but I am very satisfied with the way everything seems to look and respond.
I can't say enough how much I appreciate the time you have put into this. My guild mates are wondering if I quit due to the combat changes
I have told them to take a hard look at your UI's, cause I think they are great.