Redefining archetypes to cause less confusion witht dual color archetypes Whirlpool Warrior; Tomebound Lich are more in line what you'd want from these colors. Also there's no esper commander, thinking Alela, Artful Provocateur fits in perfectly.

Gods and graveyard strategies are stronger than expected, efficient removal could be help against them DismemberScavenging Ooze The Meathook Massacre

Also removing unfun cards for more interactive ones. Spark DoubleScourge of the ThroneWishclaw Talisman

Replacing clunky cards to make the cube feel and play stronger Ornithopter of ParadiseGemstone CavernsKlauth, Unrivaled AncientArcane SignetFauna Shaman, although I'd keep an eye on Umezawa's Jitte