His animations are good, but there's a big difference between in-game cutscenes and rendered ones like his animations. He uses the base models ripped from the game, but I would wager he also adds more bones/etc than the actual in-game models have to actually achieve the types of expressions/movement his characters do.

There's also the question of how well everything fits into the style, if an ultra-animated cutscene like he does shows up in the game but only every once in a blue moon, it would probably feel pretty out of place. And rather than somewhat stiff cutscenes like the game currently has for major cutscenes, I feel like incongruencies in style make things look worse overall, tbh.

If they did hire him, you probably wouldn't even really notice it. It's not like SE's cutscene issues are because nobody knows how to animate a cutscene at SE, or something.