As for live use, I find the QC to be - possibly - a much better user experience than my Kemper Rack. I won't know until I try it of course.
I have used the Rack on countless gigs and it has been OK. But I'm tired of carrying it around. If I can stuff the QC in a guitar case and carry my speaker that will be a big help to my aging and aching bones.
I have never tried the Kemper foot controller. Too pricey on top of the $2700 I paid for the Rack back in 2014. It does look cool. But I'm not a big morphing guy. I have a BJ Devices Midi controller with a built in exp pedal that has worked just fine. With the QC I'll be able to leave that at home as well.
Not worried at all about people spilling drinks on my unit. Not at most of the venues I play.
All of the above is dependent on the Qc sounding good to me. If it doesn't work sound-wise, I'll continue to gig with the Kemper.