Which is why in the second part of my post, which you didn't quote, I said different workflows work for different people and everyone's opinion will be different.Depends on your needs and the live context. There are certain things that, for me, still put the QC far below the others you listed as a viable live performance tool option.
I could easily play any gig with a Fractal, Kemper, or Helix, but I would be worried about having to use a QC for some gigs.