Personally I want complete elimination of all pops and switching noise. This applies to ALL Mesa amps. Popping is difficult to avoid when switching between different output levels (ie different wattage levels), but a $3000 amp should not pop when switching between channels or modes. Other Mfgrs have managed to solve this problem. Marshall, Peavey and Diezel for example.
How come I can eliminate the popping issue completely in all amps that I build, and Mesa, with all of their wealth and resources cannot deal with it? To me it seems that they are a victim of their own desgin "style". If you look closely at the way their circuits have developed, there is a common design "theme" throughout, with them using the same "old" electronic ideas, like the switching mute topologies and even brand of components in ALL of their recent amps. There are better and more modern ways to deal with this issue.
I'd get rid of the reverb too, because that's also the source of an annoying lapse in the sound when switching from a distorted channel to a clean one.