ARSR
Honestly, I've been wanting something AR on Summoner's Rift for a really long time now. I understand people complain about ARAM all the time or don't consider it a real game because for some reason most people don't think there's any strategy in it. In actuality this makes you learn whatever champion you end up playing better and it introduces you to different kinds of gameplay and combinations that work without outside influences such as baron, dragon, or fed champions from other lanes ganking you. Ultimately this makes better overall players who can learn more and faster than those who sit in 5v5 on the same champ in the same meta every game. Having ARSR lets you bring that to the map with the greatest capability for tactical strategy as opposed to champion strategy and team cohesion, meaning literally that ARSR requires more strategy than ARAM or normal SR. Yeah, people are complaining because you could get a champ that doesn't fit well in the position you called or the whole team might not have a support or jungler, and yet that's the whole point. Learn how to play more champs well and how to strategize on the fly with what you have, that's part of the challenge and honestly where I've found most of my fun in League.