Just lol, what's not to "get" about the game's mechanics that would make the amazing camera a piece of shit? Should just say they can do better and leave it at that. He probably feels like he has to defend the team's honor or something, but saying that he feels like the camera in the first game was incredible and misunderstood doesn't give me much hope that it will be any better in the sequel.
So, as someone who didn't like the camera in Epic Mickey, I think what he's saying is that:
a) Freely controllable cameras in 3d platformers are tough to make.
b) They're especially tough to make on the Wii, where you have a little less to work with control-wise.
c) Because of the paint/thinner mechanic (like any "destructable terrain" mechanic), calculations for camera clipping / orientation stuff aren't as easy as they would be in a game with static geometry.
I'm not really sure that's much of a defence, if you release a product for full cost, you owe it to your customers to resolve issues that you have, but I think as an
explanation, he's probably not wrong that the game's specific design made it more difficult than the average game.