The Mirrorverse works due to the camp factor. Play it totally straight and it doesn't work.
Otherwise...well maybe Descent would have worked out better as a Movie story instead. There they would have a better budget and time to work the story out better.
I mean, the idea of renegade sentient Borg individuals is a pretty cool one when you get down to it.
Hm, a movie about Hugh and those affected by him. That could be pretty cool, actually. Could've been a follow-up of sorts to FC, doing a kind of an arc like 2-3-4 did. See the collective Borg in one movie, and see what happens when you take that away in the next. Hm. INS seems that much worse now.