Just an Idea: Ranked "Teambuilder"

Hey Summoners, Hey Riot (if you read this),

I started to play LoL in S3 and started with rankeds this season. When the Teambuilder for Normal games was released, I thought it was the best thing, that could ever happen in LoL, since one of the most frustrating things were the fact, that people already started raging about who plays on which lane, before the game even started.

In SoloQ I mostly get the lane I want, as I'm a main jungler, but still, there are moments, when I'm last pick and my chances to get my lane drop to 1:4. If the case comes, that I have to play adc, it's over for 75% of my games, since I'm bad at this role. I even practised adc in around 40 games not becoming better at all, so I just gave up on this role and now I always gamble, that I get jungle or at least fill any other role except for adc. Now, many people will argue with "Don't play ranked if you can't play every role." - well, I don't care and I will simply ignore this and continue playing ranked the way I used to. There is no official rule, that you are forced to be able to play every role to be allowed to play ranked.

Now back to the topic: I have an idea to solve this problem. I'm aware, that you can't simply implement a teambuilder in ranked, since you have picks/bans and it's a matter of strategy whom you pick against whom, but my idea is a bit simpler: A pseudo-teambuilder: Instead of picking your role, your champion, your runes, etc. before even searching for a match, you can simply chose, which role you want to play, and nothing more. You can still communicate with your team in pick/ban phase, rotate, etc. but at least you don't have to argue about your lane anymore, which gives players a much more relaxed athmosphere in pick/ban phase.

And since I talk/write too much, I will stop now and hear, what people think about this idea.