Yeah, I've read FM forums thread twice, through all the pages in last couple of months
When looking at photos from Lee here, or these below, which are VM lens on A9, I don't really see any issues with this combo, those photos look great for me. I know that for professional photographers they have some differences and issues, like field curvature and those corners, but for my personal use, I don't really see them there, if you know what I mean
https://www.flickr.com/photos/156790896@N06/with/40314932835/