I completely agree with you.
it is good to have somebody of lendl's stature and experience in your corner. lendl provides the calm comfort.
andy can let his emotions get the best of him at times but he calms down and relaxes when lendl is in his corner.
but lets be clear about why andy pulled this off:
1. he did well in davis cup on clay
2. he did well in madrid
3. he did well in rome
4. he did well at RG
that told me very early on that andy was finding traction with his ground game. it also furnished him with the confidence needed to do well at Wimbledon. all this was happening long before lendl was asked to sit in his corner.
lendl or no lendl, andy quietly set his sights on Wimbledon. he knew he had to be ready if opportunity presented itself.
andy gets 75%-80% of the returns back in play. that is a massive advantage. that means he can get into those points and place the pressure on the other side of the net.
you cant win in this sport if you cant break. you have to be able to get the ball back on their serve.
it also takes some pressure off your on serve.
andy was hungry, focused, determined, and in rhythm thanks to his huge progress and work on the red clay.
now compare that with rafa who has made an art form out of lip service. andy is out there working, competing, and battling for his place in the tennis universe while rafa is just talking about it.
roger was prepared too to some extent. what he was not prepared for was 10 sets in his last 2 matches. that took a lot out of him. he ran out of steam but that is understandable. he is 35 next month. but at lease he is putting himself in a position to challenge for slams and masters events.