Long-term: I think the biggest killer of the potential of everything you've sunk into here is simply its arcade format. What I envision is a great title like this going beyond the confines of the screen and having a scrolling space map of a roguelite, with increasingly difficult, complex enemies in a campaign, perhaps even with multiplayer. Have a home base with different types of missions to take on: politicians to escort and convoys to protect, enemy superpowers to assassinate, and armed-to-the-teeth space stations or helpless colonies to defend or take down. Your payments for completion of such missions are what you'd use to buy power-ups, and maybe even upgrade from ship to ship. You should be able to lose drones in combat or even have power-ups damaged and destroyed over the course of a lengthy interstellar conflict. And having one monster boss at the end would be glorious to see and overcome.
Oh, and it needs tons of asteroids.
There is SO much potential here!!!