I'm glad you like it! I pretty much agree with all your criticisms, but on balance I am pretty happy with how it turned out.
My original plan for the game involved lots more work on map generation, I've got several different planned map types in my notes. And I wanted the discovery of new areas to work something like what you describe, hunting for clues that would point you towards the next level(s). But I spent so much time ironing bugs out of the sprawling map system and ship movement code that I just didn't have the time to implement any additional kinds of area or even flesh out that basic "space station" type any further with details like furniture and so on.
The same time sink meant that a lot of the numerical balance of the game never got done, so you're right that it can be pretty swingy based on what ship you get and whether your lockers randomly have good stuff in them. I tried to mitigate that a little bit by having the different ships guarantee certain items and randomize others, so there's some consistency in the initial loadout but you might get lucky and get a cool thing.