The number of AFKs in Dominion is too damn high!
Seriously!
If you play Dominion, you'll notice that just about every other game has an AFK. People seem to queue up for Dominion thinking that it's the game mode to play if they only have ~5 minutes to spare, resulting in a LOT of AFKs. I've never seen so many people leave a match on Summoner's Rift, Twisted Treeline, or even ARAM on Howling Abyss; however, Dominion's disconnect rate is ridiculous. I just played a 3v4 for about 10 minutes before the two AFKs on the other team returned.
Action needs to be taken. Dominion has been kind of forgotten for a while now, but there's still a sizable chunk of players who play Dominion and enjoy it.