Well that is working out horribly so far. Fusion 8.5.x is unusable on 10.12 due to a bug that causes an immediate crash when grabbing input control. I as well as many others reported the bug long ago but they have been unable to fix it. No surprise - the outsourced team is probably still scratching their heads trying to figure out what's what.
Works fine here too, but you are correct that this is a serious issue that people are bumping into.
Here's a quote from the product line marketing manager from VMware Fusion on this topic [0]
<quote>
We're really sorry about this situation, but rest assured it's our #1 bug right now.
It's technically both our and Apple's bug. The default behaviour of something we always called/did was changed in a later near-final build of 10.12, and that introduced this bug.
We and Apple are working together but like always we can't disclose timelines.
Please note that we are absolutely working on resolving this issue and issuing an update as soon as we can.
What if they estimate it's not worth the effort? Or is misaligned with other interests?
e.g. Apple could sell macOS licenses to run in a VM on non-Apple hardware, but they don't. To run macOS per the EULA, it can only be done on Apple hardware.
Entire team got fired, but yes still being maintained from a new team of outsourced devs.