Rotating Game Modes

I really like the idea of the rotating game modes. I'm wondering why they couldn't be an everyday thing? With the removal of Dominion there is one less game mode than the past years. What if they made it a permenant rotating que? Where each game mode would last two weeks or monthly. 1st month could be Ascension (our first rotating mode), then URF for a month, Poro King, One for All, etc. Each game mode would take its turn for the set time. But instead of catching it on a weekend you could play it anytime. They have the resources and server space. Just have to replace the dismantled Dominion with the rotating que. Anyone agree? Or if Riot could have a reason to why this couldn't work? Not a compliant just wondering.