Do we have any sort of information on how big the Shattered Space Story Expansion is supposedly going to be? Because 30 bucks extra seems excessive, especially when the game is already 70 bucks. Kinda feels like they just want to lure you with the early access, which will likely be a hot mess anyway.
File size isn't a good indicator for content. The majority of a game's file size is made up of assets, so at best you have most of that to be new models and textures of "something".