i use t hate ibjjf but now i prefer it cause least guys still fight for top position and dont concede bottomJudo rules are definitely worse, but that doesn't mean we can't criticize Ibjjf as well.
in these sub only things guys now train to butt flop and try to hang onto a leg lock not trying to dominate position since points arnt really scored for positioning
i use to wana see sub only formats but as i gotten older years later i seen how its negativly effected bjj as a martial art i feel as reasons stated above