Ah, my favorite argument: "Zelda has loads of stages and few characters, so representation is ok." honestly sounds a lot like "The Zelda games are not about characters at all so we don't need to represent them."
I'm a Zelda fan, so I'd love to see more playable Zelda characters. I dislike that Zelda seems to be the only series bound by the "The character must make more than one appearance in a game" rule, especailly since some of the characters are incredibly recognizable. After all - I still see Majora's Mask logos all around Game Stop. I don't really see anything for characters like Lucas at all. Also "We got the triforce trio" implies that only the specific main characters are important - in that case "we already got the Mario core cast" tells us that
aren't important. Or "Pokémon is only really about the trainer and characters like Pikachu!" Again, why is Zelda subject to restrictions the other series are not?
True, I don't want one champion over the others (unless it's Urbosa, but I'm biased in her favor). But the fact that Midna and especially Skull Kid, have recognizable looks and personalities. It is really annoying that, as big of a series as Zelda is, it's represented by three versions of Link (which are all semi-clones and only one has a unique few moves to reference one version), two versions of Zelda (both using completely original moves, one with some game reference and the other without), and Ganondorf (whose moveset is also clones from another character entirely)