I don't get it. Russell Wilson is who he is. As one poster put it, he excels at his game, but not at the game.
He is one of the best in a Carroll style ball control and explosive play type offense, but a terrible fit for a modern NFL QB role. He's an awful match for a complex Payton/ Shannahan/ McVay type offense. He understands the complexities of modern offenses and defenses, but it looks like his processor freezes up, and he reverts to his simple reflexes, when faced with processing it all at game speed. It's just that those reflexes are so dang amazing, when they can be steered appropriately.
If Pittsburgh will build a game plan around his strengths and weaknesses, he can return to the statistically impressive oddity that he was from post-Suh injury 2017 to 2020ish (when his mobility became limited). With a dominant defense, and a Carroll style offense, I do believe that he can return to post-season success. Possibly even a second ring.
His undoing in Seattle may have been his hubris, but the lack of success at the end of his time here was more because Carroll could no longer bring the kind of defense needed to keep Wilson in games, and let him do his thing. If, and it's a big if, Wilson has learned his lesson, and he doesn't have delusions of being a field general, he can certainly find success. Tomlin is probably the only currently active coach who can provide the environment for him to find that success.