Optimizing Teambuilder

I have a couple of ideas that would help make Teambuilder better for everyone.

1- If someone specifies a role that they want on their team (ie top lane tank) And a champion who has a primary or secondary tank tag is available then it suggests them. For example Nasus is classified as a fighter but he is almost always built tanky so it would suggest a Nasus if one is available and so on. I feel like this would help shorten queue times by a decent amount and even if you don't get exactly what you want you get the next best thing.

2- After joining a team you have to wait a certain period of time before leaving. This is to stop people from joining a team with only 1 or 2 people and instantly leaving because they're impatient even if the team has just been made. So the more people there are the faster you can leave (incase you don't like the team comp or the champions.)

What do you guys think?