An R5 Mk.II with improved eye-control AF? As soon as it gets announced, I'll order one. The various AF control buttons are no use for me, my right thumb having grown insensitive.
I'm not at all bothered about eye-control AF, I generally just place the central AF spot over the subject and let the camera track it as I recompose. For landscapes I generally focus manually, and for macro I prefocus manually at the desired reproduction ratio and then rock back and forth until the subject is in sharp focus. But I appreciate it would be handy for you, I'd just turn it off.
What I'd like most to see in the "R5 Mkii" are:
Sensor with better DR and better mid-high ISO performance (45MP is enough for me).
Faster readout.
Much longer battery life.
"Stickier" autofocus, that works in all AF zone options.
Higher resolution EVF with DSLR-like natural light simulation.
Exposure bracketing in electronic shutter burst.
Choice of slow/medium/hi-speed bursts with electronic shutter.
Elimination of freezes and lockups.