I installed 7, and am just realizing how much work adjusting my existing presets is going to be. No fewer than 75 amp parameters are reset during de/re-selecting the amp model. While only a minority of these has been modified in my presets, they still need to be verified since I do adjust many advanced parameters. The fact that the Amp block graphic EQ is reset alone is going to take time. I'm going to make a habit of not using it in the future. My presets all sound markedly different. This is not a trivial process.
I may have to switch back to 6 for gigs until I can sort out 7 at home. I can't tweak everything in the time between gigs, and I certainly can't play gigs with 7 until I re-tweak. Once 7 is adjusted, it sounds amazing. If only I could afford two units to avoid constantly reloading firmware versions.
I knew what I was getting into when I moved from the Ultra. And I know it will be worth the effort. But damn I wish I had a magic wand.
EDIT: I am discovering that I don't need to use the advanced parameters with Q7. I previously used many of them, but find they are no longer needed. The improved quality is hard to qualify in words. The low end is tighter, less flubby, yet still as powerful. It doesn't seem to "get in the way" of the rest of the spectrum while still being quite strong. The attack is improved without ice pick syndrome. The highs are more articulate without being harsh, in fact, they are smoother than before. It seems more compressed in some ways, yet less compressed in others, which defies logic. Whatever Cliff did, he hit it out of the park. I don't think tweaking will take as long as I thought, though I do have a large number of presets to tweak.