We already have mixed fleet same course regattas. The only relevance this thread has is if you are talking about a National/North American Championship.

Daniel, you say a mixed fleet same course regatta will bring more boats to a National Championship. I don't agree, there is no chance I will spend close to $2,500, drive 24 hours and burn 5 days of vacation to attend mixed fleet same course regatta especially when I can attend one in my own back yard nearly once a month. In fact I just attended one of those, it cost me 65 bucks and it was 35 minutes away.

If the F16 class wants to put on a Mega event then do it nobody will stand in your way. As Tornado Alive said, if it has traction it will survive it it doesn't it will go away.