I am in the same camp. he is just not himself these days.
it seems like something changed after the back injury in Melbourne.
he said the other day he is finding the "passion" again.
I am not really sure why the passion went away since he is a world #1 and has a chance to go after the slam record.
how many players will ever get that chance in the future? he stands alone in history to be able to go after the slam record.
his concentration and focus goes away as soon as he secures the lead and puts himself in a winning position in his matches. he is getting better but he needs to focus better fast.