Meh. Black Radiant is cluttered with so much garbage now its hard to see what the hell your doing. Hopefully there is a way to change it back to the old GTK Radiant layout, otherwise this'll be a pain to use.
I mean, come on, animation and FX editor/preview? Was that really necessary to add?
Unreal Engine 4 is probably the cleanest UI you can get, don't know what you're saying... (Plus it does have a 2D grid if you look hard enough.)
Though I disagree that the new Radiant looks cluttered it would be nice to have the option to go back to GTK style if you so desire.
I think the animation/FX previewer is an awesome feature. I remember going back and forth many times to get it to look the way i wanted it to. It was a pain to have to re-compile/re-build mod every time.
So far what i have seen is nothing but improvements.