I honestly think that, to AJ, none of that shit matters to him, at this point. What's there to really be gained for him, by having another run with the strap, other than outdoing his previous run, which went over a year, I think? Much as he was booked poorly for a portion of it, most wrestlers don't so much as sniff the WWE title, and those that do get it, most of them never held it as long as AJ did. Man basically did it all, already, and became a world champion literally everywhere that mattered. As far as he's concerned, after doing all that, plus becoming a grand-slam champion too, in WWE, for him, I believe he's reached a point where there's no need for that.
As a huge fan of his, I would definitely not be opposed to him being a world champ one more time, and would welcome it, but it's not really necessary. At this point, it'd just be padding for his stellar career, if you really think about it.