#1 I hear some people complaining of the difficulty in the game. DO NOT CHANGE THIS. The difficulty of the game gives it it's replayablity, it's charm, and it's challenge. Every time it is something new and even reaching that end boss is a glorious moment! You nailed the difficulty, don't make it any harder or easier.
#2 People complaining about ships being too difficult to attain because they have no control over the events. Once again DO NOT CHANGE THIS. This is what replays are for and I understand there is completionist out there, but the random chance of unlocking a new ship is great fun to us that are just playing the game for the fun of it. Stumbling upon a new ship when you weren't even looking for it is awesome! It keeps you replaying. You nailed the difficulty of unlocking ships, don't make it easier or harder.
#3 Expansions: DO WANT. Please oh please do not just keep the game as is. Expansion ideas for this are endless with the options of new races, ships, enemies, weapons, sector types, etc etc. There is a plethora of ideas in this "Not Startrek" universe. Take a month breather, pat yourself on the back, and then announce that an expansion is underway. I will friggin throw money at the screen in a heartbeat.
Thanks for taking the time to read this if you did, and see you in the Kickstarter for the expansion

- BlueDagger