Team Builder Bonus IP for tough to fill roles...
Team Builder is such a great game mode. If you want to practice or learn something specific, you can just que up into Team Builder and off you go. The trouble is that certain roles seem really hard to fill. Namely Jungle and Support (although, adc sometimes takes a while too). You have to deal not only with long que times, but also people getting impatient and either ditching or disbanding a match. This sometimes leads to waiting 15-30 minutes to actually get into a game from the time you initially que up.
The feature that let's you know what is currently in demand is great. Why not take it a step further? Award extra IP for those willing to play those roles. After all, if you're only wanting to practice Zed mid, there's not really any incentive to que up as a support just to make the que go faster.