[2021] BXP/PVE Bias

Consider also the average game-length for Coop vs. Random battles.
My experience has been that a Coop game, on average, last around half as long as a Random battle.
This is going to be a reason for different earnings.

Unfortunately, I have also noticed submarines dragging Coop games out quite a bit...
Definitely feedback that has made it's way up

That's what tests are for!