I think for the trials there should be a certain set of weapons you could "rent" just for the matches.
Ex. There would be one of each weapon, all the same stats for everyone and you just choose your loadout. Base shot gun, base auto rifle, base sniper, etc...
That would be a true trials of osiris, force the participants to stop their complaining and bitching because everyone uses the same gear.
Edit1: Make each round a random roll of items so its varied loadouts
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So basically halo multiplayer? Id be fine with it, forcing people to use the same weapons so it is only skill that divides the masses