Fractal does do that. That's what "Authentic" mode is: just the controls the amp has.
But none of them are being used for modeling. That's the great thing about HX Stomps, they can be used for so many things. One is my master MIDI controller, the other is post-amp effects and acoustic instrument processing.
It seems complicated on the surface, but once it's all put together creating a new preset is as simple as programming 5 MIDI messages in the Stomp, everything is automatically kept in sync, there are built in backups, and best of all during a show instead of trying to remember the tap dance routine to hit all the footswitches in the right places all I have to do is hit one single switch each time I need to change sounds.
So I can focus on the music and not have to worry about the gear as much.
Actually, with this setup the only thing that would need to be on the ground at my feet would be a little 2-button external switch and a volume pedal.
I like to think of it as deferring the problem. Since the whole thing is modular I can easily swap out whatever I'm using for amp sounds at any time. So I could just keep using the DSL for now, and later replace it with a Kemper, or a QC, or whatever else I decide.