Why has Lands seen a shift on Mtg Top 8 towards 3 Depths only?
Previously they ran 4, is it just space with W6, Blast Zone and Field of the Dead all now after spots?
I imagine Field of the Dead is the most significant new inclusion. It provides an alternative win condition, one that calls for a completely different set of answers from Stage-Depths. With Crop Rotations and Gambles, shaving a copy of Depths doesn't make it that much harder to find when you need it, while drawing two copies of Depths is generally fairly bad.