Game modes played on dominion. competitive play on howling/twisted/summoners

I think there should be 1v1 and 2v2 mode on howling abyss then 3v3 on twisted treelike and 5v5 on summoners rift. These are the competitive game modes that people are playing anyway and should always be available. These featured game modes are fun but I think it may be better to keep all other game modes on Dominion. Riot put a lot of effort into creating that map but it really isn't being used, unfortunately. URF on dominion would be crazy fun IMO.

I am not sure why showdown was ever considered a game mode to begin with, it should always be available.