I think their sound design is basically a one-man operation, and it's kind of amazing he's done as much as he has. I wouldn't knock him for not having cracked the nut on how to model a high quality acoustic piano, which very few people have managed. (Roland, Pianoteq, maybe Viscount?) Going to straight sampling could be a possibility--and in fact, there was a recent facebook post where he showed a new piano-playing mechanism that was developed for the purpose of better capturing samples so maybe that's a direction he's going--but I wouldn't assume there's enough memory in the existing Mojo61 design to hold a deeply sampled piano, either.
I'm a bit ignorant on Crumar products. Do their other products besides the Mojo (e.g., the Seven) suggest Crumar is pursuing a quality AP sound, even if not for the Mojo?