Bogey and Blayes, there is no one to blame. Not Steam and all other Plattforms, not Paradox, not Romero.
The Platforms which sell that Game, have all the 2nd DLC still in the Pre-Order / Buy-Screen. Means: The Development goes on, but is not seeable for the Public anymore. That could have a lot of reasons after Corona lays down all or reduced the Production-Power for all Computer-Games incl. DLCs, which are in WIP. The 2,5 Years of forced brake have encounterd all Companys (Game-Developers, Logistic Companys, Hotels, Manufacturerers etc.) worldwide with more or less outcomes.
Romero deciced to make an complete Game-Design-Refit to an better Game-Designer-Workingtool in the dayly continuing operation and all their Games. If they wanna do that, then it´s their good right. Many Companys played with such an Mind and some are doing it through the Time Corona and the last match with the Unity-Game-Designer-Company gives them.
I don´t see a problem with that. If the 2nd DLC for Empire of Sin will come in 5 or 10 Years, then it will be so.