I think riot adding an exp multiplier for bp owners would be the best thing that they could do rn (that would be a quick thing for them to implement). It would boost their sales loads because a lot of people don't buy the battle pass unless they get it completed, and if they don't complete it then they leave it unbought. If they added an exp multiplier, it would influence players to buy the battle pass. It's a win/win in my eyes. We get the battle pass done faster/just get it done as a whole, and riot gets more cash.