That's true, the problem Mary Geoise is having with food comes without precedents. And it WILL keep getting worse as you said.
BUT that is also the reason Sakazuki got out of his comfort zone in this chapter, he clearly understands the gravity of the situation and he showed it after talking with Tensei.
Sakazuki will probably make a move against the WG at some point, imo. He already warned the Gorosei once. To me, to erupt the way Sakazuki could, is not worth because of the shallow words of some whiny Celestial Dragons. IF Sakazuki will have that moment, it will be in front of the very top of the Hierarchy: either the Gorosei or Garling.