ARAM maps

So for the Bilgewater/Gangplank event Riot had replaced The Howling Abyss with The Butcher's bridge. But as the event ended, we went back to normal. And I was thinking, why invest so much effert in a map never to use it again?

So here's what I think would be cool: when you play ARAM you can either vote for what map you want to play, or it could just be randomized. So we could have both. They don't really have any gameplay difference anyways, and ARAM is kind of a "just for fun" mode. So why not put some added variety and use both map skins?