I'd like to suggest a new rule for next season that allows to have a voluntary referee judge a match, if both parties agree on him before the match. He then has the absolute power to make decisions on the spot then and there. This could help with hindering rule breaks that are otherwise difficult to do something against after the battle and with no or little evidence, for example, FIC, fire out of line, officer aim, teamkilling trolls (resetting the round or no), not filling in gaps etc.
But this would just be optional and if both parties can't agree on a referee or if one isn't available at the time, things would go as they are now. So this would not be a hassle for the league organizers, because they have nothing to do with the individual referees (except they want to be a referee themselves from time to time) and maybe help a couple matches to be more fair and according to the rules.