I would love to have more ship models available for purchase.
Not only for a different look, but also with different "affinities", like some are better at maneuverability, others can shoot harder or longer, some are better at taking damage etc etc etc.
it would be very cool if there would be a hangar function, where you can store a number of ships so you can for example look back at your first spaceship nostalgically and think "hmmmm i want to fly that one again".