I don’t think it’s ever preposterous to let an extremely highly paid player walk when there’s a minimum salary replacement ready to go. They just badly missed on projecting Onwenu to LG. It certainly seemed reasonable enough to expect him to play well there, but in reality it went worse than anybody could have expected.
I still don’t understand how he somehow plays tackle well with no college experience and as the shortest and highest BMI tackle in the NFL yet couldn’t just switch sides at his natural guard position, but here we are. That’s just the way it is, I guess.