We need better punishment for leavers.
I know, I know, there are leaver-busters, but sometimes they just don't do justice. I just got out of my third ranked game today (bronze v hehe), and experienced a leaver in all of them. The one that blew it was a Ryze that fed a Tryndamere and left, we made a good comeback but couldn't do a 4v5.
Anyways, besides a delayed queue, I'd say a 'suspension,' not able to play ranked games for x amount of time, or a demotion (probably already implemented). There are many more ways to punish someone rather making them wait, as they still haven't learned their lesson and will leave again. I get that people DC, or their PC overheats, but you can comeback from that. When you're gone a full 55:39, it wasn't just an error.
I'm fed up with with the leavers, they keep me from gaining ELO (insert 'it's you not you're team!!!!' yada), as I've played better than usual and still have to deal with this.