Yeah, they eventually decided to spread the love around after the backlash they got when they announced Steam only ...and Microsoft graciously allowed them to do so

 

Wasn't the whole steam only hooplah about any future expansions after the core game and Dragonfall?

Sort of: the DRM-free version was initially only available to backers as a direct download from the Harebrained website, Microsoft's conditions precluded any sales from GOG, Humble Bundle or any other platform. When the restriction was lifted, the direct download option was removed and backers instead given the option of either a GOG or a Humble Bundle key.