Well, eventually it will get a NATO designation. I hope it's not Jeff...FC-1 is still used in reference to JF-17 in China. That is official and she used it rightly.
The Viper upgrade exists and given the lethality of Fighting Falcon, the same is used in reference. But still, if we are supposed to argue and insist on something which is merely a creation of DCS guys; I am really sorry but the argument as such is nothing but waste of time.