The things i would like to see being fixed/tweaked, besides cheaters, is when solo queuing what teammates you get vs the ones you play against. Being put up against 3 stack master/preds, veil solo queuing should not be a thing at all in gold/plat/low diamond! I don't care if the argument is, well there isn't enough players to split people.
Idk if they can ever really fix this ranked algoritme/system, they have made so many changes/attempts, and nothing has actually fixed the main issues & make it fair & enjoyable for all skill levels & whether being in a squad or going solo.