Maul only had 15 minutes of air time so I don't really consider him a main character. While Luke is a main character, I would be more excited if the Luke was Dagobah, Besbin, RTOJ, or Tatooine. Without an X-Wing for Luke to fly, Luke in X-Wing gear is kind of useless.
He's still a pretty main character. And has a large fan following.
And I don't think Luke: X-Wing needs an X-Wing to earn being made.
We don't have a Rebel Blockade Runner for Captain Antilles either.
THE SPY. THE SPACEMAN. THE GODDESS. THE ROBOT. THE GORILLA.