Teambuilder wouldn't work anyway...
I became a support main in S4 because of teambuilder. You might think of teambuilder as a cool tool that allows you to pick the role you want. But I'll remember it as the system that forced me into thousand games of support...
I kept enrolling into this because there was less fight about the role you'd play and no one was going toxic for being the last pick into something he hate. Overall a better game experience at that moment.
But now, I don't see why I'd bother filling support in teambuilder when I can get a fair chance to play at least once in a while another role in draft pick. And I'm sure I was not the only one who was doing the same.
Tl;DR: Hi, I'm the support you were direly waiting for in teambuilder, and I say RIP teambuilder.