A warning about the peculiar ergonomics of the X-H2S

i don't know about the H2.  However, I can tell you how my Leica Q2 handles it.  You set the camera up the way you want.  Then you save that preset - which includes everything, AF type, focus mode, shooting mode, capture mode, i.e., Raw, jpeg or raw plus jpeg, any jpeg settings which would include film sims on Fuji, auto ISO settings, IBIS settings, - every thing down to the delay after pressing the shutter button to the activation of the shutter.  So you save them and at least with the Leica you name them.  You can then save the settings to the card and later to your PC.

Then when you call one up, you can bring up the menu and make a single change.  Say you want to add a shutter delay, then you can do it from the quick menu.  Then the camera will operate in that mode which is not the same as your custom mode but the custom mode as the starting point with the changes you have made.

This is how the Q2 and the SL2 for that matter work.  However, they custom modes are selected on the display (or viewfinder) not from a dial.  However, I can see with a fixed dial how confusion could arise since if you make a change - how the camera is set will not matched the programmed settings on the dial.  I would hope in this case there is an indicator to tell one that.

I looked at the H2S manual and there seem to be a lot of buttons that I would have deactivated as there are too many too close together than could be accidentally activated.