I'm on the fence about it. I used it on a SMALL project yesterday and didn't mind it at all, but on my bigger mixes I'm often comparing settings and like to have multiple UI's open.
It would be better if it enabled some kind of simple key-command cycling through of things, like a down arrow to jump to the next track's compressor, or some such. Though determining and editing the order would be a giant headache I reckon.