I think the new RG Planeswalkers that gets land back from gy would be very strong in Eldrazi. Between the new canopy lands, and karplusan mountains, shouldn't be a Mana issue. Would be amazing for wasteland obv, alongside the new sac and draw lands, and pinging w ever can chump. Maybe worth the splash?
If you removed all the disruption from the original list shown above in post 1 and went with say:
-1 skull clamp
+2 Helm of Awakening
+1 Mox Opal
How much would it speed it up?
Just theory crafting here, but dropping a helm shouldn't be an issue since you "should" win that turn most of the time, right? Or is it too much a liability?