Salary, development, and injury considerations.
If and when injuries subside and Benning decides that the players in development are ready to be promoted, they'll relocate LE to either Utica or any other AHL/overseas club that will take him on loan. Until then he's a stopgap extra forward who is wildly overpaid.
If Okposo didn't provide badly needed locker room leadership in Buffalo, he'd be in the same boat as LE.