this makes me think of the original a7. lighter and smaller. would need the updated resolution for evf and display and better af. and of course, better ergonomics. otherwise people will whine about buying a small camera and complain that it is too small :P
oh and would have to go back to the smaller battery.
Honestly for all the short-comings of the original a7/a7r, those cameras were fun as hell to shoot with.
In the current state of photography, camera makers need a diverse set of offerings because the market is becoming smaller, but increasingly more segmented. Also....photographers now buy multiple cameras for different, and multiple overlapping product offerings isn't necessarily a cannibalization risk, but an opportunity to add incremental sales. I'd totally buy an updated OG a7 as a 'daily driver' type camera. I don't need to carry a $5k camera set-up when I'm just out with the kids...nor do I need world beating performance all the time.