Hopefully Andy will be sensible lad and bide his time. There's too much at stake to do otherwise.
I'm sure he will be, although it might not be easy for him to be patient (see article I posted @03:34pm on p.1), but if nothing else, I expect that he will obey the specialist's instructions and advice to the letter. He might have argued and discussed things with his team before, but, assuming he trusts this specialist implicitly - and there's no reason why he shouldn't if the op has been a success - he will definitely be paying attention to what he has to say when he goes for follow-up consultations, at which I would expect his fitness trainer and physio to be present at some point.
No Prod, I'm sure it was from this year. It mentioned Nadal not being able to play last year because of being out and him being glad he is playing this year. I do suspect the details might be from before Andy had his surgery, but the article was definitely from this year.
I think it would have been before he had surgery because that was a very recent decision. Also I doubt AD or anything else re tennis is on his mind right now because he'll be having other things to cope with. Anyway I think that players probably want to be on the entry list for this very early because they know they can withdraw nearer the time and their place filled fairly easily. Didn't Nadal pull out at the very last minute this year, but a replacement was still found?
Also, even if Andy does recover sufficiently to go to Miami, I'm sure he will not feel inclined to participate in Bhupathi's proposed Indian Premier Tennis League during the off-season, which seems to show little sign of taking off this year anyway.