I know you're not a fan of his, but objectively I think his work at Chelsea, a team in chaos, when he arrived, was pretty impressive given where he left them. He has provided the base for Maresca to push on this season. Very likely would have done so himself had he stayed on.
I should mention in his last season he had a poorer squad, Kane aside, than what's there now as he dragged it to 4th and the Champions League final. But actually I don't want to go over old ground.
I loved Poch, still do, my heart would love him to come back, but my head says he shouldn't because of the division it would cause in the fan base. I don't think the arguments on glory glory would be good for my mental well-being tbh. My choice is to move forward with someone like Iraola.