I don't think it is, in and of itself, a bad move. I love the Jets getting worse every day. If it were my team, however, I would only question the way it was handled. Ryn gets a lot more mileage out of an emphatic statement right after the game or on Monday than he does by saying it will take him time to figure out. Everybody knows he and the other players don't want Tebow playing QB. Can't say I blame them. And they have had McElroy for a couple years, so should have some idea of his ceiling (hint, it's the deep out.)
Now there isn't much he can do right now to get a legit starting QB beyond signing Jeff Garcia, so his best bet probably is Sanchez. He just did the guy no favors in his handling of the situation.
This is the teammate and leader:
And this is the passer: