I love my 16R. UC Surface is great, but like any virtual controller, it's not the most immediate thing when all I want is to adjust some bass during a song. Having to go through 5 screens isn't always ideal. The only thing I wish it had was an option for a USB controlled physical fader + channel strip. Basically a Faderport 1 but for the rack mixers. The controller would have volume, mute, solo, and a 4 band EQ (all knobs). It would have a way to select a channel as well plus a USB port to allow for recording. A one knob comp might also be cool.