Agreed, we don't want more ref involvement in the games, and we certainly don't want more video review. The main goal should be to get the calls right without slowing down the pace of the game. 3 refs works reasonable well. I'd actually be in favor of teaching the refs to call fewer fouls, err on the side of letting play continue. I wouldn't want a return to the 90's style of play, but I think we could strike a balance.