It almost begs the question that the authorities knew a 4pt hit was coming, so that's why the gave Everton that amount back. It all just seems like arbitrary figures and it's difficult to see any particular reason for a specific number of points to be deducted. What warrants a 10pt hit, or a 6pt hit, or 4pts etc.
Maybe I'm being cynical or don't fully understand the complexity of it all.