for all the talk of WHAT to do, the big question is WHO will be doing it.
the Wilfs have to make a quick decision on what to do with the GM. If they replace the GM, the new person is going to want to have input on hiring a HC. that will take time, and the Vikes could find themselves at the end of the coaching carousel. It would just like the Vikes to piss around on hiring a GM and HC, and wind up with all of the top candidates already having signed elsewhere.
then, assuming they have a new GM and HC, then those people are going to need to evaluate the roster and determine a strategy for the draft, free agency and/or trades, starting with what to do with Cousins. The QB decision will be the first domino, and will influence a lot of other decisions due to the salary cap implications.
I don't see anyway to pull off a quick revamp and still be in playoff contention. This team needs a pretty complete re-do. they would be better off cleaning house and going for a fresh start. Of course, that would mean telling the fans that the team will be taking a big step back for a few years.