It says they have allocated the Champions League and Europa League places based on current standings, fine so why are they not relegating teams currently in the relegation zone?
Reading more, I see Cambuur and Graafschap don't get the rewards from being in the top two of their division, but Ajax and AZ Alkmaar do.
There isn't a solution that avoids unfairness, but finding the least unfair way can be done, and this isn't it.