It should actually really help with the OAM. SMW's routine that compresses $0420+ down into the $0400 area eats up a good amount of time. Same with the one that shoves all sprites tiles offscreen at the end of every frame.
Don't see it helping too much with anything else sprite related, unless you've got a really slow custom one. Collision maybe?
Don't see it helping too much with anything else sprite related, unless you've got a really slow custom one. Collision maybe?