i say regular crews! there will be time. make it with the presumption that most crews will be 5 people, and everyone gets 3 stock. So all crews get 15 stock. Crews would be 4-6 people, 1-2 alts, players must be deactivated/activated prior to playing the other crew, done at the same time characters are written down, etc. Regional crews is just not inclusive enough imo.
or we could give Team Crews a try. i dunno, there is no point in doing Regionals anymore. -_-
but yea, time constraints. if you did what i had in mind for the last pound. where you have crew battles going on simultaneously with all over events, i think it would work. you set aside 4-6 tvs just for crews. at most only two people per crew have to be playing at a time. so 12 people at most are going to be removed from teams/singles play at any given moment.
with the nature of crews it can be stop and go, if everyone for a particular crew battle is in the middle of tourney matches, no biggie, just go whenever the next person on call is available. you could do something like, first and 2nd rounds are 12 stock to speed things up a little bit, and do the same thing in losers bracket, then push it to 15 stock. finals could be like 20 stock like its supposed to be. i think we can do it.