I quite like the idea of having an APSC body alongside my A7III but the current design puts me off, the cameras really need front and back wheels for aperture and shutter control for me. I think I may have a bought an A6400 by now if this was implemented.
I have an A6000 as my travel camera - and while it's not a front / back configuration, it does have twin dials - top / back, which can be set as Shutter and Aperture (or Shutter and EC, Aperture and EC) - as that's how I use mine.
It took a bit of getting used to, but not too much, and now I happily use both the A6000 and my old 'traditional DSLR' style A900 (which has the Front / Back dial configuration), with no issues switching between them.