roger needs to mix it up a little now after this surgery: I would start playing a little more on clay.
I would also practice more on clay.
it is a good way to fine tune those strokes and also stay healthy.
Yes general, but don't forget doubles... IF he recovers well from the surgery and plays at Indian Wells, why not?

Respectfully,
masterclass
doubles does make sense for Roger general masterclass.
he is very good at it and he plays it the right way. it is also a way for him to start racking up some titles.
doubles can work for some singles players.
Hopefully all goes well. I hate when one of the Big Four are missing, tennis just doesn't feel the same.