The Bills are going to trade up to somewhere in the top 4 to get a QB. And I obviously disagree with you about McCarron's abilities, outside of him having a hot wife. Buffalo is saving cap space with McCarron - he's like $10mil cheaper than Taylor on the books. But Taylor is the better QB. I think Cleveland is going to trade either the 1 or 4 to Buffalo.
The Jets trading to 3 is interesting, and they gave up a lot for it. If they want Barkley, they may have needed to go to #2, so I don't think they're doing it to get Barkley. So I see it as a QB related trade. I'm guessing they like 2-3 of these QBs but not the 4th and are willing to settle for whoever of those guys is available at 3, and they wanted to be ahead of Denver. As for Denver at 5, if they stay there, look for them to take the ND OG. The next thing Elway needs to address is his woeful OL.