I think it's about a fresh pair of eyes as much as anything else. We're often the worst judges of our own work, our strengths and weaknesses -- and a coach can see what works and what doesn't from a different perspective.
i'm not sure what any new coach can teach him about the game now, it's not rocket science
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My thoughts too, which is why I liked him being coached by Lendl, someone with a lot of mental fortitude which eh obviously passed on to Murray.
Hope Mauresmo can resurrect that.
Billie Jean King was a coach and "Mikhail Kukushkin and Denis Istomin are incredibly rare on the ATP tour in being coached by their wife and mother respectively."