I understand you point. A rollback is different than a patch or update. An update creates a save point and the update is applied in place at that moment in time. A rollback reverts back to the previous save point before the update. If the devs revert to the save point before the update, anything done since then would be removed. In this case, the servers would have to go back to April 2nd. Any save points after that would include AOW Chapter 4. There isn’t a developer on this planet that would roll back software a full month.
It’s not the same as rolling back an OS to a previous restore point. The coding in gaming is too intertwined to be able to rollback a key feature while retaining game play details. They only way backward is forward and pushing out hot fixes