Well, I've wrecked this team several times (luv u bb), however it is an exemplary Sand Team that is definitely a model for DW. A few nitpicks I would use (though I would never use Chandelure, such a bs mon') if I utilized the team would be to try out Overheat on Chandelure instead of Flamethrower, since you're going to be switching out after trapping something anyways, so I don't see why Flamethrower is in any way better. I would also try out Frustration instead of Rock Slide on Excadrill, since it allows you to hit Rotom-W hard who seems to be a threat due to the major Water weakness and lack of a resist. I hate SashTar since it's such a waste in my opinion, but I have long before told you that and you declined my advice, so be it. Also, I would try out Bulk Up instead of Swords Dance on Blaziken, and Baton Pass to pass off boosts to either Excadrill or Garchomp since that's broken. With this in mind, I'd use Lum Berry on Garchomp instead of Salac Berry, and Outrage instead of Dragon Claw, for power! Also, you're desperately weak to Rain and Keldeo, so keep that in mind.
Love you! <3