Possible New Rank Classification
Well, since there were several complaints with the rank classification, I decided to see what you prefer.
Keep in mind that the God ranks are in reference to how they called Madara and Hashirama in the ninja world, not because they are really Gods, it's just as it is canonically in Naruto, and for the Celestials is the same, since the Ōtsutsukise are called Celestials canonically in Naruto.
Here is what could be the new rank classification: {What appears between () in each rank means that those ninjas who are in those power ranks can be called in either of those two ways.}
-First: Cannon fodder, normal Genin and elite Genin.
-Second: Junior Chunin, normal Chunin and elite Chunin.
-Third: Special Jonin, normal Jonin and Elite Jonin(Low S-rank).
-Fourth: Semi Kage(Mid S-rank) , Kage(High S-rank) and Super Kage(Peak S-rank).
-Fifth: Legend(Low SS-rank).
-Sixth: Supreme(Mid SS-rank).
-Seventh: Semi-God(High SS-rank) and God(Peak SS-rank)
-Eighth: Low Sage-rank, Mid Sage-rank, High Sage-rank and Peak Sage-rank
-Nine: Semi-Celestial, Celestial and Super Celestial(Unknown to everyone in the ninja world except for Rasa or Kaguya).
{If you prefer this new classification vote here.}
{If you prefer the old classification vote here.}