Rotating game mode
League has tons of mods they could easiliy rotate each week to give the player a change of summoners rift.
Ascension Black Market Brawlers Dark Star: Singularity Definitely Not Dominion Doom Bots Hexakill (either on summoner rift or twisted treeline map) Hunt of the Blood Moon Invasion Legend of the Poro King Nemesis Draft Nexus Blitz Nexus Siege Odyssey: Extraction One for All OVERCHARGE Snowdown Showdown (keep that for Christmas) Ultra Rapid Fire (NOT ARURF)
Each mod rotates each week, It doesn't have to be balance at all, cuz it would just be here for fun. Right now all those great things you did are sleeping in your database. Just make one availaible each week!