I personally prefer no temples, a bit more white and dropping TKS. Whatever build you go for, you have to have something to do with late game mana, an answer to moat (flyers, copter, ballista, Elspeth) and a ton of answers to shops.
Only played a couple of tournies since ballista was released, currently on one match loss due to tiredness - auto copied a chain when I already had an answer on the board. Can't beat a god draw from PO storm when they're on the play, but you can take game one off dredge - depends on your local meta.
If I was going to BoM this year, I'd happily take Weldrazi.