While nothing presented was especially groundbreaking, I'm just happy YC decided to venture to the east coast. That in itself is better than nothing. It's their first event over here, and a decent one at that. As for next time, the OP's request of getting MBAs to wear ties and developers to wear black shirts is a bit opposite of startup atmosphere. Dress codes are kind of frowned upon. Plus, if you did that, it'd turn into a high school dance with ties on one side and black shirts on the other.
Oh, and if PG and company would have spent a good amount of time on "YC, the school, their process" I think there would have been a large amount of disappointed folk. Why go to a YC event of you don't know what YC is? I'd speculate most there were quite familiar with YC and its process and were looking more for startup advice, similar to the stuff given.