[Captain Kwok]

Some of those are not operational in-game like illusion and derelicts. There's also no monsters at this time either.

Migration is actually quite useful particularly with breathable planets as their populations grow very fast!

Sight level - As in how sensitive (ie can we detect cloaked ships etc)
Sight range - How far you can see

The maintenance is fine. You don't even notice it really.

The last line is not used.