Teambuilder Improvements

Teambuilder sounds like a great gamemode to practice a specific role or champion, but it really needs some functionality improvements. Here a few suggestions:

1. Picking a champion automatically selects lane/role based on meta. You can change it, but don't have to (speeds selection up).
2. Picking multiple roles. Maybe I just want to jungle and I'm willing to play either a tank/fighter/assassin/mage jungler depending upon team comp. I should be able to select jungle/any role, then find a team, then choose a champ.
3. Picking multiple positions. If I want to play Lee Sin and am willing to play jungle/top/mid, let me pick just that and join the first team with an opening for any of those lanes.

Feel free to add your suggestions.