I'm certain Sanji will get it. Does he deserve it? Above the likes of Wyper, Sabo, Moriah, Kyros, Hody Jones or Crocodile? People that actually tried to conquer or become King of their fields showing incredible determination while doing so? No, of course not.
Above the likes of King, Marco, Law, Kuma and other accomplished world reknowned pirates?
No, of course not.
But that's besides the point. If Oda wants to give it to him he will, no matter how dumb it is in the grand scheme of things.