I agree with you in principle, however certain details of what you laid out rub me the wrong way.
Met. Methodios, as you sort of indicated, obviously had a reason for doing what he did. I believe that he has had enough of the OCA preaching about unity and then doing whatever they want, when they have clearly not been recognized by every autocephalous church. He chose this moment and even to point that out to them.
Is this not a valid reason for him doing what he did, and why not...?