Im sorry its been awhile for me i know someone explained it once. Bypassing the issue of whether you should or shouldnt what needs to be edited so that Italy can annex Ethiopia instead of Puppeting them? If i wait till Feb 1st and change the wargoals it still automatically puppets them shortly after (this is playing with the Politics on AI note...).
I recall it was something in a file that could be edited or at least i rem hearing that. Any help?