Checked with latest update.
In the meantime I really feel kidded.
This issue is still not solved, since 6 months!
Changing the zoom factor within the game options still does not change anything.
In the moment of applying any change the screen black for a very short moment but the zoom level remains the same.
Further to that the page of know issues (Known Issues & Solutions – Age of Empires Support) still does not list this issue.