Right, after asking for a few weeks if the spawn rates for structures on the asteroid, derelict ships and such, have been lessened, mattatlas finally responded and said they were.
I can't quite find if the reasoning for this was explained anywhere, but I honestly see no real purpose for this. The structures were never really too overpowered, it was mostly just something to do on the side to break up the monotony of EVA jobs. Even before the change, it was pretty hard to find anything worthwhile, but now it's just nigh impossible.
Please link me if this was talked about anywhere, I don't use the forums much so it's very likely I missed something.