for Grand Prix format, i would also prefer separated matchups so the fighters can have separate camps for each fight
but the problem for the promoters is that the 2-fight 1-day format works better for them because it shortens the length of the tournament. over the course of the tournament he has a total lack of quality fights for an entire weight class to put on fight cards.
so the best solution to me, is the Bushido 9 format
the quarter and then the semifinals in the same day, finals 3 months later barring any major injuries.
HW: Cro Cop | Barnett | Gonzaga
LHW: Rampage| Shogun
MW: KANG | Sakuraba | Spider Silva | Baroni | Akiyama
WW: Thiago Alves | GSP | Mach
LW: Gomi | BJ Penn | Aoki | Jamie Varner reppin' AZCS | DIDA
9-7 in sig/av bets