Honestly, I'm with soaptoaster on this, and I genuinely think BackworldTraveller alternative will be much more useful than constantly spending our coins on more and more niche suggestions for the article "types".
I don't know if it's necessarily worthwhile to keep adding more and more granularity to the list of options. That being said, a freeform option like suggested by BackworldTraveller would be convenient, just something of a shortcut to what can be done manually in the sidebar sections. Also, space station is already an option in the Settlement article type.
As an alternative, could location type be a list of suggested types with the possibility of a free-form type being used so those unusual values could be typed as required. Same principal could apply to building types.