I'm getting used to it but a big part of that might be because it's got the 40mm f2.5 on it
The things I've noticed about the A7III v A7 are that the bigger battery is a real move forward, the higher ISO performance is better, I can set the metering to follow the focus point and the WB seems much better.
Oh and when I zoom in on a picture in the EVF or on the back screen it magnifies the point where the focus point was. I don't remember the A7 doing that, I'll have to check. I do miss the AF/MF/AEL button and switch so I've set one of the A7III custom buttons to swich AF/MF.
The biggest problem I had yesterday wasn't the cameras, it was working out how to use a head I'd not used before.