Blake's offense just has no rhythm to it. It's too mechanical on the block. If the defender doesn't go for one of his many pump fakes he's stuck offensively.
He needs to find a way to be better facing up as well, because taller PFs give him fits.
If Jordan continues to improve his offensive game, he'll be a very valuable piece. I think he will. His blocking ability is already elite, but once he gets the offense down, he's going to be a problem.