Changes

Thalia, Heretic Cathar → Recruitment Officer
Glorious Protector → Lion Sash
Shalai, Voice of Plenty → Unexpectedly Absent
Unburial Rites → Planar Disruption
Brainstorm → Ledger Shredder
Thieving Skydiver → Faerie Mastermind
Mind Control → Control Magic
Elder Deep-Fiend → Thing in the Ice
Black Sun's Zenith → The Meathook Massacre
Distended Mindbender → Ebondeath, Dracolich
Tombstalker → Archon of Cruelty
Deathbonnet Sprout → Cankerbloom
Hexdrinker → Tireless Provisioner

Notes

Mostly the focus was on removing underwhelming cards. Also:

• I cut Hexdrinker because it was too non-interactive.
• Lingering Souls is now classified as Orzhov instead of white.

From all of the adds, I am most suspicious of Thing in the Ice and Ebondeath, Dracolich.