I agree all those are nice things to have, and things I'd want to see in an update. Now how can you sell those features to management? How do these improve the experience for the everyday end user?
I'd say the snapshots feature could be a major selling point. Windows needs a good backup/restore solution.
It just seems like potentially a ton of work to satisfy the needs of "people who think about filesystems", which is an extremely small subset of users. I can see how it might be hard to get the manpower and resources needed to rework the Windows default filesystem.
I really have no clue how much work it takes though, so it's just speculation on my end. I'm just curious; on one hand, I do see where NTFS is way behind, but on the other... who cares? I've somehow made it past 20 years of building WIndows PCs without really caring what filesystem I've used, from 95 all the way to 11.