You can't really say that other teams that were bad last year made comparable upgrades, we disagree there. Going from literally the worst possible quarterback play to average quarterback play is a very large jump. The Jets had a -4 turnover differential, Cleveland had a -28. The regression Cleveland is due for is close to historically unprecedented.
Josh Gordon, Njoku, Duke Johnson and Jarvis Landry compared to Robby Anderson, Enunwa, and Jermaine Kearse - I don't see the Jets skill guys in the same stratosphere, and that's coming from a lifelong Jets fan.
Jets had a 3-5 record in one possession games last year, MAYBE you could say that can jump to a more normalized 4-4. Cleveland had an 0-6 record in one possession games last year - normalize that and it's worth 3 wins.
I understand your points diving into the roster, but I just don't agree. And my actual points are based more in basic statistical regression, which the Jets just don't have a case for given their point differential, turnover differential, record in close games, and 2017 win total. They actually overachieved a little last year.