Is this change going to roll back the SPS reward by league pool that just went into effect a season ago? It seems we are changing thing so rapidly that we don't even let the change settle before changing again.
I think the best solution would be to calculate the winners reward based of the HIGHEST teams score. That way if a lower level beats a higher level, its gets rewarded, while getting no additional reward for beating a lower level. It still rewards the skilled players.
I'm saying I'd a level 2 summoner cards beats a level 4 reward them for it. It helps adjust the argument that players who can over play their cards are now penalized. It's an extra reward for beating higher cards.