Not much to be impressed by.. Bottom line, the YEC doesn't carry nearly the same prestige anymore compared to the when the top dogs were scratching and crawling for it 20-30 years ago. Fed had a good late season surge here.. But Fed is held to a high standard really.. And the past 2 years, his main surge have came at the very end of the season when the other guys are burned out, injured, just picking up some extra cash.
I don't believe Nole cared about the YEC at all.. It was obvious.. Judging by the way Nadal has upped his game at the Davis Cup contrasted to the YEC, he didn't seem to care as much either.
Every player cares about the WTF.
It's just that Djokovic couldn't do anything about it, he was either worn out and/or still not completely over his injury.
Nadal also wanted this one badly but the surface is just not good for him though he still has time.
Prestige matters but you still have to win and the WTF is one tough tournament no matter what the prestige.
Besides, Fed had the same struggles as everyone else this year.