Axgard Braggart comes out and is replaced by Astor Bearer of Blades.

Would Halo Fountain be good given my ability to tap creatures regularly?

Given Depala's ability, shouldn't I be able to run fewer creatures/vehicles and still sift to get them?

Swapped out Radiant Scrollweaver + Thaumat + Nautiloid Ship for Fleetwheel + Weatherlight + Priest.

Maybe trade out some 3 CMC vehicles for 2 or 4 CMC?  Conflict w/ Depala for turn 3 play.  Fleetwheel Cruiser, Thundering Chariot, or Weatherlight seem to be the best options -- the 2 CMC aren't appealing for this deck, but more ability to filter my library or trample would be good.  Not sure which 3 CMC I'd remove -- maybe Peacewalker, but maybe a dwarf.  Hofri doesn't really fit the build, so could be a candidate to remove for a strong vehicle.