Keane can't be what he's not. He's not blessed with pace and alongside others without any pace either side he's going to be the one looked at to provide it due to his age but it's not him. Let's see what he's like next to a younger left back and centre half before writing him off. Although I do think he has been poor so far, like many others.
honestly this is really on Koeman and Walsh. I don't know how you can think in the modern game you can get away with a lack of pace at the back. Unless Keane is being bought as a 3rd or 4th choice centre half, I can't see the sense of committing to a set up where our defence can't get forward.
really think a main priority in the window has to be solving that problem, nearly as important as a goal scorer
we haven't been this bereft of pace at the back for ages. Coleman, Stones, Funes Mori etc. Funes is a crazy defender at times but credit where its due he had all the pace required to make up for errors. Right now we have none.