I disagree it will make any difference in THIS particular relationship. I think that the fundamentals of their personalities are too different to even reach a middle ground.
That is where I'm thinking you are projecting your own relationship onto his. It's not just about her changing to adjust to his way but him as well learning to expect less of what he thinks he needs.
PAdude... I think you have a good optimistic view. Just make sure after your attempts, to know when to walk away if things can't be mutually agreed and compromised on.
Best of luck.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion