It think that this deck could really profit from the new card Krark, the Thumbless.

He plays very well together with Archive Trap, Surgical Extraction, Daze, cantrips and Brain Freeze.
Here's my list proposal:

UBr Mill

4 x Force of Will
4 x Daze

4 x Brainstorm
4 x Ponder
4 x Visions of Beyond

4 x Archive Trap
3 x Brain Freeze
4 x Hedron Crab
4 x Ruin Crab
3 x Krark, the Thumbless

3 x Surgical Extraction

3 x Field of Ruin
4 x Polluted Delta
3 x Flooded Strand
2 x Scalding Tarn
3 x Snow-Covered Island
2 x Underground Sea
2 x Volcanic Island

SB:
4 x Cabal Therapy
4 x Leyline of the Void
4 x Gut Shot
...