Exp average of 1000/500/500/500 = exp average of 2000/1500/1500/1500 - 1000. Add any number to the rating of all players and the exponential average increases with the exact same amount. So it is perfectly consistent.
Exp average of 1000/500/500/500 = exp average of 2000/1500/1500/1500 - 1000. Add any number to the rating of all players and the exponential average increases with the exact same amount. So it is perfectly consistent.