Remember the good old days were jutsu had letter ranks? I remember were some S rank level jutsu were offical named in the show and since then there has been like 3-4 stages above that...
The ranks if you could even give ranks anymore would be something like this... E,D,B,A,S,SS,SSS,SX,SXX,XXX,Z,SZ,SZZ,XZ,XZZ,ZZZ, Broken,Sharingan,Kishimoto,Tite Kubo, and finally Aizen!
So jutsu are officially ranked from E to Aizen in there capability and overpoweredness and plot holes considering some of the strongest jutsu are basically plot hole manifested into abilities.