I tried putting raw freezium in the coolant tank after getting hit by an asteroid and loosing half the coolant. It didn't do anything, despite the item description.
I went to help a stranded ship. Before going inside I checked their solar panel to make sure it wasn't dirty. It showed clean. I went inside, power was out. I checked everything, nothing was wrong. I gave up and went back out to find the solar panel had become dirty after I went inside.
I see a lot of comments about the hot/cold scanner game. I like it. I think it would be too easy if the scanner beeped while you carry it. Every low O2 planet I've gone to I've solved the hot/cold game on the first try before the O2 runs out.
I suggest tagging some items as "important" (such as upgrade mods, quest cargo, and anything else with a finite quantity) and having the game remember the state of planets where an "important" item has dropped, or alternatively not letting you drop it with the same code that keeps you from littering in cities. Probably should also use that code to prevent littering on rescued ships.
Primary loop is fun.