Hey Bobble, plz have a look at
this doc I prepared a while back. A few of the items on this list have been addressed.
If I think of more UIB specific tweaks, I'll post them here
1 that comes to mind is making the scripting popup window resizable. Would be nice if the "Add Property" popup had a button next to the value field that opened the larger scripting window.
Of course it would be great if that scripting window had some more robust editing tools, stuff like color coding and line numbers.