I just checked NFLN to get the score and saw the QB sneak and the 4th down pass before it shut down again. But I have a couple of comments anyway.
1. The 4th down sneak was less crazy than you think. No one was over the C. The DT make a great play falling off his block to hold it to a 6 yd gain. It very well might have garnered a first down. The Jets were in 4 down territory anyway. Making 4 yds is a lot easier than making 10. So was it unorthodox, certainly, but not crazy,
2. The throw on 4th down to Decker was a pass any QB in the league would aspire to make. He stuck it in between 2 defenders on a windy night. I have no idea how Fitzpatrick has played before that pass, but for that moment he was as good as anyone in the league.
3. Buffalo will be a good test if they manage to hold on for the win.