arguments about sand veil causing garchomp to become overpowered are based on the last meta when garchomp was not banned. that meta did not have therians, it did not have genesect, it did not have shadow tag goth, etc. those arguments are flawed by definition. if garchomp is still overpowered, this ladder will prove it again, but right now there is no conclusive evidence. that's the whole point of the test.
as for sand veil being uncompetitive, that's a whole different story, and i would agree that it still stands to this day, but perhaps sand will be weak enough that the council can overlook it...? let's leave that to our policy people, AFTER the test is done.