I wouldn't call Vegas totally fine. Half-assed and very power hungry architecture. By the time it came out, it was already outdated and till this day doesn't offer everything that was promised. Price was a joke even when I disregard mining craze and it's effect on gpu prices. You need to fiddle with it and undervolt to make it run efficiently, etc. All in all Vega is a fail for a gpu aimed at gamers.
Vega VII is completely wasted on just about anyone. Dieshring of already useless architecture wont save anything (from a gaming GPU perspective). You say there might be some enthusiast market for it, but it's completely niche. Release of Vega VII makes 0 sense and 16 GB of vram is pretty much useless, especially considering how expensive HBM2s are.