But it gets a little more complicated when you want to mix stomps and snapshots. Because then I have to go into the control center
I would try to stay away from that. At least I did for my live/rehearsal presets.
Why? Because it'll "eat up" your stomp mode with snapshots, hence pretty much losing their capacitive functionality - which, as said above, I just love for quick tweakings. It's the reason why I was always using a combination of 4snaps/4stomps live, even if it mean some limitations in terms of flexibility (and I will never understand why there couldn't be at least a 5stomps/5snaps and a 10snaps mode, would've made things a *lot* easier for me).
Btw, the way I usually arranged things was to have the 4 snapshots to select between some basic sounds (I always only used one big kitchen sink preset per gig because I hate not having global access to some parameters - ultimately perhaps reason #2 for me to sell the Floor), such as clean, clean lead, dirt, dirt lead and then use the 4 stomps to alter these sounds (I excluded them from snapshot control).
I sometimes (but very rarely) switched to 10stomp mode, but basically I kind of reserved the 6 stomps not used in 4stomp/4snap mode for quick patch adjustments (so I would for example also have EQs, the IR block and what not on there, things I usually don't ever switch while playing).
Worked pretty well for me, but as said, there's severe limitations in terms of creating a great live switching environment (I'd possibly went for 4/snaps/6stomps if that had been possible outside of Control Center assigments).
Anyhow, I can perfectly understand how the Headrush UI is a much better thing for quick onboard adjustments, but otoh, once I had my HX Edit homework done, correcting patches during rehearsals, soundchecks and sometimes inmidst of a gig has never been an issue for me.
But then, it's obviously a very, very different thing if you really work out songs during rehearsals and are looking for new sounds to accomodate the vibe. For such things, the Helix can't even remotely keep up with whatever touchscreen controlled units. Fortunately, I hardly ever had to do that with the Floor.
Personally, I think it's always suboptimal to leave things up to tweaking in a room during band sessions.
Pretty much depends on the kind of tweaks you need to do.
For instance, smaller (or even not that small) corrections to make a sound sit in the context well can only be done properly, well, in context. Personally, I need these kind of adjustments pretty much all the time as I'm playing telephone band gigs with lots of variations regarding the band line ups, musical content and environments. This is why I finally went through great lengths to slap a setup together allowing me to do these kind of adjustments in what I think is the best way ever within the limitations of currently available units (for me at least - in case you're interested, I went pretty much into the details in the GT-1000 thread
here).
Also, as said above, once you're in a band also interested in shaping their sound in creative rehearsal room sessions, I think it's a great idea to have quick access to all kinds of things. Kinda like "ok, let me look for a wobbly modulation of some sorts to suit the bridge". This is something you can't exactly prepare beforehand most of the times. And fwiw, back when I was more into these kinda things, my bandmates were abolutely fine with me looking for some interesting sounds every once in a while.
Ideally, the HX series would have decent mobile OS editors (not that Boss junk but true HX Edit versions). Would possibly even be worth to spend an extra 100 bucks (or maybe even less) for a tablet dedicated just for that job.
But we obviously won't see this happening for the current product line anymore.