Unless going support Team Builder is too risky to bother
Since the launch TeamBuilder has been dodgy at best but has now become near useless. Unless you are support or jungle (sometimes), you risk wasting excessive amount of time every time you queue. Whether you search and after 5mins get a game that won't work (you are ad and they are all ad, ect), or you start your own party and spend 10minutes hoping people don't leave. I usually only get a small amount of time to fit one or two games in a day and I can't risk that on hoping that I will find a game.
Simply put TeamBuilder is too unreliable