Tbh I dont think the Queen nor Charles see bringing Doria as a way to accomplish anything. If you bring Doria, you better bring the Midds too. Bringing Doria would not show unity, only favoritism & at times like this, they need to show unity between the remaining senior royals that will tow the royal line when the Queen is gone. When the Harkle marriage goes south & turns ugly the last thing Charles needs is to show favoritism towards the problem couple. Itll reflect poorly on Charles judgement