What I don't understand is why you seem to assume almost for granted that Odysseus will be consumed by some irrational rage. Odysseus is a veteran of the Twelve Days. He has seen rage, has been rage, and knows its effect. He has seen his comrades commit suicide, unable to cope with what remained after the rage of war. He has seen the devastation wreaked upon poor Macedonia. If, as I guess, he has spent his contemplation wisely, he knows what rage can do to him, and why he, the future Emperor, must not be enraged.
He survived the Twelve Days. If anyone can keep a cool head, it is Odysseus Sideros, Kaisar of Rhomania. Any cruelty he shall do, shall be done not in anger, but in calculation.
^Such is my opinion. The author and readers like me may well differ, and I trust I would indeed find a differing interpretation interestingly handled.