It's a heck of a lot easier to be inclusive rather than exclusive.
For example, having the definition of a profile fuselage basically being defined by a maximum width measurement of .750" aft of the wing, opens up the competition to a broader range of competitors, designs, materials and importantly, innovation. Be as innovative as you can be with your designs within that sole parameter. Yes, it might yield some impressive, complex profile ships that are big and powerful. However, as a direct counter-point argument to the impressive macho ships that some will build, I offer the legitimate example of Joe Gilbert and his simple Ringmaster as the giant slayer. That Ringmaster is as far to the other side of the scale as one can be. To that end, I would propose that you guys might drop all the antiquated profile definitions and limitations once and for all. .
Run what you brung...and hope you brought *enough* (* ie, skills, experience, practice, oh and a good plane helps.)
And, as always...The biggest limiting factor IS ALWAYS going to be the guy flying the plane.