Team Builder - Bot Lane Match-ups

My friends and I have been doing Team Builder quite a bit lately. One thing we have noticed is that finding a support is extremely difficult.

The reason I think this occurs is because the Team Builder captain can only select a single Role for any lane, really. Really, it would be nice if the captain could select: "Bottom Lane / Mage + Support + Tank" or something along those lines.

Would really appreciate it if someone at Riot could consider this (add it onto the backlog! - or project plan if you don't do the agile thing). It's getting pretty frustrating. (At 15 minutes as I type this.)