I play with a controller or the Deck controls all the time, and I actually prefer the controller UI to the M&K UI; once I got used to the way everything was laid out, and how to manipulate the wheels, it just felt like a better experience to me. To answer your original question, there are no functions or information missing from the controller UI, nor is any of it particularly difficult to get to in normal play… you just have to get used to where everything is.

They are radically different UIs though, and I wouldn’t expect everyone to like them both. If you give the controller UI a solid try and it doesn’t click for you, it’s definitely okay.