John, seems a viable idea
Only thing I can see is the F3/4/5 finals have a larger pool of driver that could attend, which is great. But.. the BRC's would be almost the some pool of drivers, with the addition of the 30 F2's from Nationals. Making both E.o.S. finals virtually the same.
It could be that the two meetings could be combined into say.. the F2/3/4/5 finals...Not sure how we could incorporate the Juniors/Veteran finals though..
Just some thoughts....