At each level cap we’re gonna land on in SoD we’re gonna be just below some important spell ranks for certain classes. Like Shamans Lightning Bolt gets a new rank at lvl 26, which makes elemental currently almost worthless. Same with Mind Flay I believe, and maybe Frostbolt?
It would be awesome if spell ranks were properly aligned and scaled with your level, that way no spec would fall behind for such a sad reason.