He's 23rd in fWAR among CF, with not playing all year. He'd be around 18th had he played all year, so it's hyperbole to say he wouldn't start for most teams. That said, your points are valid, and he could degress from here even more. It's sad, really. So much promise and skill.
OTOH, he might just start hitting again, and he'd be around the 10th best CF then.......