Can anyone confirm with certainty if difficulty level plays into the upgrade path. It makes no sense if beginner mode gives the same amount of game play points as legend. If that is the case it should be changed and award players a better multiplier playing at a higher difficulty. I have to imagine this could be a rather simple fix in an update patch.
There is a multiplier based on difficulty.
Check the 3rd tab in your game complete screen.
It’s 1x on rookie, 1.1 on vet until 1.5 on legend/online