What's done is done and I'm board with turning a new page on our keeper, but I have no expectation that a keeper with better footwork will have any impact on the footwork of our forwards.
Take Antony for example. What was our complaint with him all season? It was that he was so heavily one-footed that it became child's play to defend him. I can recall more than a few occasions where the defender invited Antony to go to his right but he insisted on going to his left with the play eventually resulting in a broken half-chance.
As for pressing higher up the pitch, our forwards just didn't want to commit to that much work. Antony to some extent did, but definitely not Martial, Rashford and Sancho...all of whom view such work as beneath their ball-playing ability. I'm just not having the argument that Martial refused to press because De Gea is poor with his feet.
City aren't even that much of a pressing team as they control the ball so much they don't need to press very often. When they do lose possession deep in the opponent's back third they will press, but City's bread is buttered by control of midfield and clinical finishing, not pressing. Liverpool at their peak was a pressing machine and Alisson played his part in that, but it was the workrate that all 10 outfield players committed to that made their pressing work, not Alisson's undenied brilliance as a keeper.
As for Onana, the 22/23 Inter Milan team made its coin as a counterattacking, not pressing, side. This fact neither speaks for or against Onana, but if we're looking to past experience to suggest where the future is heading, Onana's experience in a counterattacking side isn't exactly indicative that United will become a successful pressing side. The following statement wanders into speculation so take it with a grain of salt but when you look at the players we currently have there is nothing in the makeup of our most likely regular starting XI -- Onana, Shaw, Martinez, Varane, Wan-Bissaka, Casemiro, Mount, Bruno, Rashford, Hojlund and Antony -- that will look anything like a high-pressing side.
All I'm saying that we ought not to get carried away with the supposed transformation in our game that Onana will deliver us. Nearly all clubs outside of the top six sat back against us and took their few chances on free kicks (Olise) and shots from distance (Benrahma) while we dominated possession and created chances but found the clinical finish we needed to put the game away by the 60th minute beyond our reach. Against the top six last season at OT we took care of business but found it impossible to control midfield and create any chances, which had nothing to do with Dave. The first season for any new keeper at OT is going to be a rocky road. He will make mistakes even as his fizzes balls to his fullbacks.