Hear me out. What if URF but less crazy and imbalanced.
We know riot already doesnt wanna keep urf permanent because people would get tired of it, but what about a gamemode without the 80% CDR and infinite mana? So just faster gold, weaker towers, Super dragon, and canon? A game faster than boring normals but less annoying than urf?
I've played a decent amount dota 2 and all I do in that game is play turbo, something akin to what im suggesting. I queue for pretty much every gamemode there and most of the time it sticks you in turbo because thats what everyone else is queueing for. Theres tons of reasons why this would be a great mode to stick around even if Riot don't want to keep Urf around.
It's on the normal map with normal only slightly gold accelerated characters so it wont take up a lot of design time.
The queue is super populated so we know it's a popular idea.
It's nothing crazy so people wont get bored or annoyed of it.
It's just a normal game but faster so you dont have to commit to a full 30-40 min game but you still get to play something close to the gamemode we all play League of Legends for.