I don't think they are going to fix it (as in an Update that fixes the partition size without cmd prompt intervention).
So far the easiest suggestions I've see are -
- if your not comfortable with resizing the partition with command prompts (and even though I done things like this many time before it's still something I don't look forward to), find a free partition management tool (like MiniTool Partition Wizard) to resixe the partition.
- try the update - if it works, great
- if is doesn't work run the cmd prompt at an elevated level/as administrator and at the prompt type reagentc /enable and try it again.
Good luck and yes, this should be a fix from MS that's a one-click. I guess they consider the command prompt the solution.