I can tell by your posts that you are quite knowledgable about sailboat design. You are right about a 2' being able to sail well. I built a 1/2 meter boat that was based on a Soling design and it worked really well!
It was back in I think 2005 or so that we were playing with the footy design. It had some rules as a footy class was being discussed so I it was probably some of the restrictions that made it difficult, not just the length, I just don't recall that well.
Don't mean to hijack this thread, but the MicroMagic boats became a hit with some of the club members and they sailed well.