If the stories about stuff Lennon got up to before and after he met Yoko are true, and I guess they are to some extent at least - about starting fights with fans and worse - then I think we can't blame Yoko for things too much about what seems increasingly to me to be the lack of integrity and wholesomeness behind such songs as Imagine. This is what the article seems to suggest. Timeless tunes, no matter what anyone says, but, I have recently come to the conclusion that Lennon wrote songs like this in spite of his character, rather than because of it!