IMHO after a product is monetized, sold, etc, it is rare that you can substitute one guy (the creator) even with a whole team (successfully).
It's not a quantity game here folks, it's a quality game.
Look what happened to Apple when Jobs left the first time. It wasn't pretty. So far Cook's doing a great job, but it's only a matter of time (what happens when Cook leaves????).
Sometimes You need a Jobs, or a Lawrence.