My friend tested a few sand teams and said Excadrill is really not that good. It's not as obscenely powerful without Swords Dance, it's hard to use Earthquake unless your team is built around it, other weather teams are common, it's weak to most of the common spread moves, and Mach Punch is all over the place.
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Black 2 FC:
My Pokécheck Pokémon
RNG is kind of like firing a gun. Why shoot blindly in every direction until you're lucky enough to hit the target when you can just take the time to aim properly and hit it with one shot?