One thing that he did really stuck out a mile for me.
About two thirds of the way through the second half Posh had a corner, it got swung in to about a yard away from the six yard box. Moore came off his line, quickly and rightly decided he wouldn't get there, so he shouted to his defence and retreated back to his line ready to make a stop if requires and left it to his defence to clear the ball which they did. Not giving George Long a kicking but he would have ended up stuck in no mans land, and wouldn't have given the right call and left his own defence in 2 minds.
That was the mark of a quality keeper, and I think Simon Moore turned in the best goalkeeping performance I've seen from a United keeper in years.