Why take Dominion out?

I think Dominion is a pretty fun game style to play, I really got into it once I played teemo and other troll champs, I also like to play 3 game styles instead of having 2 back and forth the same maps, Aram and Normal. This is why I think Dominion should stay. Its really fun to play and different from normal or aram because it really has a intense gameplay, its not like as stressful like normal because its really a short game that what you mostly do is alot of team work and all that, personally I really enjoy it since it doesnt waste 1h for the game, usually about 20mins.