The current 135 minimums would be a good starting point. If you can't deliver mail to an island or resort in a C172 then you shouldn't be flying part 121 either.

Not sure, I'll have to ask. As of last month they still had people going through and the failure rates the last six months have been higher than previous norms as well.... but that can be a misleading fact, since there is no way to track if it was due to poor pilot quality/preperation or if they are testing harder to intentionally dump people. I suspect a bit of both.