Orrery seems like an upgrade to Hedron, and the numbers on EDHRec seem to support that. Orrery has proven it deserves a chance.
I forgot about Boseiju during my NEO update. Force is great. Boseiju fills the same role but can also hit lands, which matters to me since I just added Bazaar and want to make sure it has enough answers.
Soul of New Phyrexia has always been a bit clunky. I never find I have the mana to activate its ability when I need to. And it’s one of 3 colorless 6-drops, an area I’ve been wanting to slim down. Playtest data shows it not being picked or played often either. It has plenty of synergies in the cube, but I think it’s underpowered now. Emergence Zone is a card I want to test now in particular because of the release of Prosper and its synergy with him.