I think if you move Dillon, Schmidt and Wheeler and keep Scheif you could come out ahead and be ready to compete next year, IMO. Again though it depends on how the talks go.
Moving Scheif is a big challenge and everything would depend on the return re: whether you're moving your window 'forward' or not.
There are too many unknowns to try to accurately categorize it as a rebuild/retool/etc IMO. We may find a lot of addition by subtraction going on, and suddenly with a new culture and new approach the roster looks better than we thought.
It might be possible to correct Scheifele - or not. Hard to know. Wheeler still at least works hard. The problem with him seems to be his handling of the C. I'm a little doubtful that he will surrender that gracefully, but again, hard to know.
None of us know the problems or the solutions. We only have our guesses based on what is publicly visible.
My guess is that Scheifele needs to go, both for the Jets and for himself. I think being traded is the kick in the ass he needs. That will also place him under a different coaching staff at the same time, facilitating a fresh start for him.
Whether or not Wheeler needs to go and will cooperate in arranging a trade will depend on his attitude toward giving up the C. He just might be glad to be relieved of it. But I suspect he will resent it. So he will have to be moved also.
My guess at this point is that both have to go. We are left with seeing the returns to know which direction we are going next season and beyond. If all we get is futures, we are rebuilding. In that case Helle should probably be cashed in also. If we get players who are ready to contribute now, we are retooling and Helle needs to be kept.