Actually, I don't think any of those are bad ideas. I think the concept behind the game would certainly justify offering that kind of flexibility. In fact, it seems like the sort of thing they could just keep adding features to if they wanted, and more flexibility in creating gameplay experiences could certainly extend it's life indefinitely. At the very least, expanding the concept into other genres would be a great idea. This is hands down the coolest thing I've seen in a long time, and more next-gen than any other game I've seen lately.