Sorry to hear that but the idea that people will jut quit games more because of lack of penalty just because their 1-2 top choice was taken and causing longer queue times is a worse idea.
I'm sorry but the fact that people will abuse it at first, sure. But in the long run people will have to adapt if they want to play a game.
If some troll wants to dodge every queue he gets? Fine with me, I don't want to play with that dick anyway.
EDIT: Also my main problem with the dodge penalty is we get to wait for 30 mins while the guy who's messing up team picks gets to move on to mess up another game instantly. You currently get rewarded for being a dick in team select since you're forcing people to dodge or play however you want them to. The troll who I had to dodge for goes to the top of queue instantly while I, who's trying to fill roles or play a good game, have to wait out a timer.