Didn't want to get lost in "quote" land but to answer some questions:
1. Thanks for the info on the LED's. I am planning on getting those fixed soon. That's the only issue I've had with my Kemper so that's a good sign.
2. The foot controller in the video is a Voodoo Lab Ground Control Pro and it's pretty much just calling up program changes, which just about any foot controller can do. It does map them wherever you want on the controller which is nice and I do send CC changes for the expression pedal and tap tempo button. It's easy to program for me, but I've been using Ground Control stuff for a long time, so maybe that's why.
3. As far as the Clean Sense, I just leave mine on 0.0. I messed around with it when I first got it but then just set it back to 0 and haven't touched it since. None of my guitars have high output pickups, though, so it might be very useful in those instances. Most of my guitar pickups are in the same range since I like hotter output singles, mild P90's and low output, vintage type humbuckers. I'm not intimately familiar with the clean sense past my limited experience with that feature.
hope this helps and thanks again!
Mike