I think there is a lot of overreaction about that play. First, it wasn't a bad decision to not throw the ball away - he had no option to do that. You could fault him for not going down immediately, but if he turtled like Brady every time there were guys on him he wouldn't be one of the top QBs in the conversation for MVP and the Bills wouldn't be in the playoffs.
Sure it sucks he fumbled, but good/great QBs get strip sacked every week in the NFL. There aren't media guys posting on Twitter singling out that one play from an overall great performance when other guys do it.
There was a good discussion in the post game thread. People simply need to let go of the "bad Josh" narrative dissecting even a single play from a great performance. Its time to move on and just accept that negative plays happen for all players. When it happens for Josh it doesn't mean there's some jeckle/hyde flaw he still needs to overcome. I don't know how anyone could have watched him this season and not think that has been put to rest.