It's the stock list with a worse manabase. Get those two Tundras in there asap, because for every Tundra that is a Plains or an Island instead you are either weaking your ability to play Serra Avenger and any other spell while keeping Wayfarer active, or you're making Fathom Seer worse.

Side note: I played the stock list in a tournament of 45 people last week, and went 3-3, which was a dissappointment. Here's to more testing though, I think I still suck too much with the deck to actually put up any decent results.