pdb1: How fair is that window of that 1 round that could add 6 months to your 6 months of tiering up of just 1 tier .1 round of 83 could make you have to go from 83 to a 63 to the next tier .
Not at all!
You don't have to "wait until the average goes down" but you wait until you have collected enough good rounds to calculate the necessary average.
As Sam said, after saturation, all it needs to eliminate a bad round is one good round. Any "bad round" goes to the garbage, but it helped you practice your game.
pdb1: To base a whole tier on the score of 1 round . Is not a fair and equal assessment of your average play . It is a total crap shoot .
True but just temporary, and ev1 should know it. Plus, you soon add more rounds to obtain the objective representation.
pdb1: Weighted totally against your favor .
Excuse me, that's a hilarious misinterpretation. And why should it be against you? If you start with a 59, it will look good in most tiers!