The Problem with Team Builder (as I see it)
The number one thing I think needs to be changed about team builder is people need to not be allowed to see what champions the other team members are picking. If you're playing a champ in an unconventional role or one that isn't OP by this week's standards, if you dare violate the meta in any way YOU CAN'T GET A GAME. It'll take you an hour to finally be able to play it, even if it's highly effective.