There are three choke points in the list that expose the vulnerability of the deck. Manamorphose, Seething Song and Burning Wish/Belcher. Getting rid of one of those is fantastic. Not only that but the Probe is +1 storm, draw a card, very synergistic with the ETW route. Your life total doesn't matter your playing combo. The deck doesn't support Opal well, but I think it supports Opal better than the 4th chrome mox. I don't have the math to back it up, just testing, but I think running the one Opal reduces your mulls from multi Chrome Mox hands. That's me though and I agree it's unorthodox. The only bonus of seeing your opponents hand with probe is if your holding belcher and etw in your hand, you see their packing fow you slow roll with whatever your goblin count is, if not then your green light to go off. It will probably help you every fifteenth game vs control. I like the new green guy that gives mana, he might be a four of, this deck doesn't play for the long game so he is kind of Belcher's speed. Need to get a set and test though.