To me, it would be an insanely bad idea to stray and make another separate app for the other Mooger Foogers. As it is, you have the delay, the ladder filter and a nice sampler all in a nice little package. Why not go further with the idea and include other gear? Maybe make it kind of like Reason with patching so that there is a little more control to the user as far as where the signal is going. Who knows, possibly that's where you all are going with this.
I just figured I'd throw that out there. I do plan on buying the hardware units one day when I have more money, but I believe it would open your market up more for apps quite a bit. Not only that, but if you made separate apps, it would make it kind of a pain to switch back and forth between them. I just saw that this whole section of the forum was called "Apps", as in plural.