1. The war is not over yet and I don't know with what criteria they say the 1st phase is completed successfully. As far as we all know, Abiy and his Oromo dominated generals conspired to let tplf get a free pass to devastate Amhara and Afar regions, to weaken them. If that was their target, yes they did accomplish. Otherwise, they must be idi@ts to prenaturily declare success and decorate army for the unfinished war
2. As to the postwar threat, Abiy/Oromuma is targeting fano. Fano can't be a threat to the country. So, they meant a threat to Oromuma. Abiy has no problem when oromia keeps building its army with the extent that no region has achieved that size. Oromia has no immediate threat contrary to Amhara. So, as Abiy tries to impose Oromuma village politics, they want to get rid of any internal resistance. For that, they want to disarm Amhara. The idi@t ANDEM will as usual accept this in contradiction with the people interest.
I think, the Amhara population must cut off the idi@t ANDEM in the event ABDEM accepts Abiys request and keep arming themselves, to defend themselves from any attack from tplf and the lines that could happen at any time. Abiy has made every effort to weaken Amhara by not giving the necessary defense, worst by preventing them to defend themselves. The only time he asked the war to be popular is when tplf had approached Addis to take off his head. This man is an evil Machiavellic.
The only possible solution to disarm is after Ethic federalism is abolished, ethnic borders are dismantled, and no regions can say this is my local army. But am pretty sure that ሴረኛው Abiy is not willing to majke this happen. The indications are his releasing of tribal personalities (majoritily olf) and his desire to negotiate with tplf and olf, the very group which want to survive ethnic system, in addition to olf dominated adminstration of Abiy.