No, sorry to burst your conspiracy bubble, but it's way more simple than that: Matto has yet to work on the enemies models, up until now he has worked on making the game-play fundamentals and the placeholder monster is the same as it was in the very first prototypes.
There are no final characters to animate with, he's not gonna pay a guy to animate something on a placeholder model, come on use your brains please...and of course once the enemy models will be in place the animations will start to pop up...
Even that was just a test thing that he did to show that he could animate in the same style...nothing more than that.