pdb1:.So what i'm trying to figure out if I have right is,that there is never a good reason to disconnect or forfeit a match at the end because a high bad score does not affect your average and also a completed round counts in your favor for your ranked round count.
+1 about the XPs - none for games quit before the end, the end being return to the main menu. At that point, also the completion will be noted for the %%.
+1 for the average thinking, with a caveat.
A high score will affect the average as long as it is not saturated from the minimum necessary rounds in the current tier. Alas, this is only temporary and does not affect the time or no. of rounds to get to the next tier. When saturated, these high scores will be dropped out of the average calc. one by one.
Thus, finally these bad scores will not affect the average.