After losing almost ALL of my urf-games, I can say this
This randomness completely sucks. Chaos is fun, but having to flip a fucking coin every game and hope that the enemies have weaker teams than you isn't fun. Like wtf am I supposed to do as Thresh against pokers? I can do literally nothing at all.
If we get to choose, I can at least pick something broken too, but now I just have to rely on luck. ARURF sucks.