Hot take: Having done Kemper, Helix, QC, and now Fractal, I would put QC in Tier 1 without hesitation. The only thing thing that's lacking that's of any consequence is a wider variety of time-based and modulation effects. (E.g. Fractal and HX are much stronger in this regard.) There are fewer amps, but captures compensate here, and what is available sounds great. The editor finally arrived, although I never thought it was necessary to begin with. (Though notably, it did address some of the obligatory cloud/WiFi concerns TGF'ers had expressed.) It won't run plugins (as vaguely promised), but neither will anything else.
And then there's the on-board UI, which is more intuitive and about 10x faster to use than anything else I've owned.
Even with an FM3 sitting next to it, it's likely the QC would be my pick if I could only keep one. (I'm probably going to keep both, because the FM3 is also amazing.)
P.S./ Hotter take: The more time I spend with QC/Fractal, the more I feel like I'm boiling cheerios in milk, or whatever that line was, when I try to get my Helixeses to sound as good. But calling HX "tier 2" would be too harsh, because it has strengths of its own, especially in terms of features per dollar in a live rig.