I love the innovation here. This list definitely seems worth a try. At the tournament, @Juggernaut-GO mentioned Horizon Canopy to me. I immediately regretted not running some in my list, despite being mono-white.
I considered running Stony Silence/Null Rod in my list, but ended up deciding against it. I wasn't sure if the mana could take it, and I didn't want to experiment too much at NYSE - and it competed with the Tormod's Crypts I wanted against Storm combo, and the Umezawa's Jittes I wanted against Shops and the mirror (which definitely paid off). The card is definitely powerful and synergistic though.
I'm actually not convinced Stony Silence is better than Null Rod here though. Enchantment is a much better type than artifact, but getting 1W mana is not exactly reliable, esepcially on turn 1. Curving Tomb->Rod into Wingmare or Thalia or Displacer or Thought-Knot just feels so much better than more resistant to the artifact removal your opponent maybe shouldn't be bringing in against you anyway. I guess this depends on how people end up deciding to sideboard against the deck.
Noble Hierarch feels really strong, but like @CwaM, I'm reluctant to add more mana to the list which already has more mana than I've ever seen in a vintage deck.
In quick defense of basic plains, Path to Exile, Ghost Quarter, Blood Moon, and Back to Basics are all cards I've heard mentioned as anti-Eldrazi. I also don't know if the deck can support 12 painlands, 4 was already pretty tough ... but that's testable.
If the mana does work out, than green gives you lots of interesting potential options