something I thought riot could do.
what if they made it possible to play on a set of different servers based on different patches, it would be hard, but I think the payout would be worth it, especially the information gathered based on the most played on and preferred patches of league. don't make every single patch playable though, just the ones that were instrumental in creating certain metas, like the preseason patches. then you could try to balance your game with this information. probably needs their own patchers, but it shouldn't be so hard, only a bit expensive.