I would even pay for a quality of life update for this game, I love it but it requires a ton of micro management.
Add at least keyboard shortcuts, for example:
Left/Right arrow keys for Previous/Next Planet.
Page Up/Down for Next/Previous Fleet
Home/End for Next/Previous Planet with a spaceport.
Also, add modifiers for increase/decrease ships on a fleet, like, hold SHIFT to add/subtract 5 at a time, hold CTRL to add/subtract 10 at a time.
Tie this to something small, like more simple random events in-game, and I think it would be very popular among the fan base.
Events could be temporary increase/decrease in productivity or research with some cosmetic flavor text.
And, if I can dream, implement a fleet management system similar to the one that Stellaris has, that would be simply AMAZING.