I'm more than happy to trust that Andy knows best how to manage his tennis and private schedule. From the start of the clay to the end of Wimbledon is a pretty gruelling stretch. Maybe he just feels it would be best to shorten it a little and keep fresher. Whatever his reasons I am sur he feels they are the best for him. It's his life.
Yes, I agree, especially when we don't know for sure. He has plenty of time before MC.
I'm also not going to worry about Andy's ranking, whatever happens at the AO. If Andy wins, brilliant, but if not and he slips to 5 for a bit, so what. Given how he is playing, if he was to slip to 5 for a bit it won't be for long.