He shot 44% from three in the post season with Boston. Yet he was a failure in the post season as well if you ask around this board.
He was viewed largely as a failure mostly because he failed to stay on the floor for more than 20 minutes on a team where we had plenty of minutes behind Garnett and Pierce.
Doc didn't play him, that isn't Green's fault and with Pierce playing 38.4 mpg and Garnett playing 36.4 mpg and then add in JO and Baby's combined 43 mpg, where exactly was Green supposed to get minutes from?
All that said, Green was essentially on a per minute basis the same player he was on the Thunder and the same player he has been his entire career during his first partial year in Boston. He isn't going to magically become a HOFer after sitting out a year.
Green also didn't give Doc a whole lot of reason to play him. He basically looked like a deer in headlights for most of the time he was on the court.
But who can blame him? It is tough enough to learn a system midseason, but he was coming in with tremendous pressure, onto a cancerous team that just traded one of their most popular players for him. And he had to learn to share with 3 future hall of famers and Rondo. It was a nearly impossible situation.
But like you said, his numbers ended up being close to what he had done in OKC, despite those struggles, which I think points to how well he fit in the Boston system, and how much guys like Rondo, KG, and Pierce make other players better.
So, I think it was very reasonable to assume Green was going to be significantly better this year (if healthy), just from having time to learn the system, and find how he fits in with the other alpha dogs.
But I also agree that to expect him to be a superstar is too much. But I think we are seeing him come closer to the potential which made him the #5 pick in the draft.