Allow resizing existing VHDX-profiles
It would be great to be able to increase the maximum size of an already existing VHDX-profile without first having to remove the old profile or migrating to a new profile.
You can change the size of the .vhd(x) files via diskpart commands. If you want to do all of your profiles at once, you just need a maintenance window where nobody is using their profiles. Attach, resize, expand, done - can be easily scripted.
This becomes more and more important with growing OST files and OneDrive on Demand.