Oath of Nissa didn't have a place anywhere, I've always wanted to add The Great Henge so this seems reasonable.
Cursed Mirror is fun, intuitive and can easily replace Heart of Ramos.
Wandering archaic is busted and adds dynamic to game play
Kytheon lengthy's mechanics can turn-off anyone and Esper Senitel, a future staple, replaces him quite nicely.
Archetype Re-definition
Green-white and Red-Black have always been a grey-area in terms of the archetype. With these new additions, hopefully people drafting the cube won't be as lost.