As FD have to make the game playable to both expansion pass owners, and those without.
It will actually mean that it's a optional freature, you can use or not.
Yeah - I got that. I also have an expansion pass. Didn't check what's included in packages now, but back when I backed it was just included in the Premium Beta package I bought. Didn't necessarily need the free upgrade pack - I just wanted to fund the game and thought they deserve a little extra.
However, I share Captain Sodoms view that I'd prefer FD to put more ressources in fleshing out the Spaceship part of the game rather than adding tons and tons of features that are poorly fleshed out.
It seems to me that FD try to add everything SC has announced, but given their far smaller budget, they're far more likely to overstretch.
Alas, the features have been announced and I'm sure FD will live up to their end of the deal as they should - after all some may have backed exactly because of these announcements.