FD offers what no other stage does. Norfair and a few others (GHZ, SV) offer a pseudo no-plats stage, but just that and having similar stage dimensions shouldn't mean it's fit to replacing the only actual one. Plus, even with the large-ish blastzones, it's super tall plats allow for way early kills off the top. It's one of the easier stages to circle camp on, especially for those with bad fastfall speeds. Characters with bad anti juggle tools might struggle to get down from plats. Not gonna touch on jank platform heights since that'd become a non-issue with time.
Every CP should put some characters at an advantage over others, but imo Norfair has the potential to be one of the more polarizing large stages. BC, FD, DS, DL >>>>>>>> Norfair, whichever three of the four are picked.