Ok, I know you are thinking WTF. There are definetly some weird choices. Like most people I expected a lot of fish and slaver. I played against 1 Slaver and no fish all day. So much for deck testing. During the tournament I played against GAT(with Tinker/Colossus), Slaver, Tendrils(w/Mirror Universe), FCG, 4cc(with Scrying), RG Beats, Tendrils, and 1 more that won't come to mind.
Someone has the decklist of the Tendrils deck with Mirror Universe? Now that's interesting.
And the Firewalker isn't a bad choice, actually. It's a bit awkward on the cc (UU will do that to you), but there's a lot of 1/1 creatures that can be annoying...
