This is win. We should make a rulebook, and I'll be happy to contribute.
Problem is, the rulebook would be like 2 pages, since Play-Doh is even more versatile and fudgeable than Lego.
We would also need to incorporate the numerous playsets, contraptions, etc. Like the spaghetti-hair people, or the mini pizza maker things.
Oh god, now you've got me all excited, now I'll never get to sleep.