Clear said:uh, may be because not enough people nominate auto-weather?
As for Excadrill, I have played PO quite a bit and I have to say that he isn't the problem. He can be countered left and right with Priority Conkel, or Luke. It is Tyranitar that is the problem. As I have stated before, while all other auto-weather needs to pick between hunkering down, or go for broke, Tyranitar does not need to worry about that.
Thundurus avoided the 2/3 +1 majority with the skin of its teeth, if he was a cat, I'd say he used up 8 of his 9 lives this time around, and will not live if he still proved to be a menace (which he probably will).
I would like to point out that neither of those Pokemon can OHKO Excadrill with priority. I'm pretty sure only Azumarill and one other UU Pokemon are able to OHKO, and even then they are not really counters as they are unable to switch safely into Excadrill's attacks.