Jacoby blew it, nothing else to say. Chip shot field goal had a good chance of winning the game. Instead he takes an idiotic sack and they not only miss the field goal but also give Seattle a short field with which to go get their own field goal to tie it and go to OT.
I definitely think they need to go to Maye. As others have said by now, if your "mentor" is making mistakes that the rookie would be making, what's the point of playing him?
I'm sure that they will not turn to Maye on a short week against the Jets (game in 4 days from now), but with a mini-bye after that, could happen. SF is a tough first start, but they'd have 10 days to get him ready to go.