he's struggling a lot and i think it's more of him (and the team) wanting the playoffs to get here. when TP was hurt, he brought out some really good games and now he's seemed to get back in the funk.
Manu handling the rock at the end of the game is Pop's nostalgia. if you're going to get on Manu having the ball, call Pop out on it right away even though there's going to be those who'll come out and defend the guy on it by calling out ur coaching experience or championship rings (weak answers btw). there could also be that TP isn't fully conditioned yet so he's more of a decoy than the main focus at the end of the games.