Joel Sherman detailed it all in this article.
That the value was very high to put the ball in play to make the Yankees execute.
They said their metrics had the Yankees as the worst positioned outfield.

The frustrating part is that Yankees fans knew everything that was written above.
It drove the fanbase nuts.
Despite those glaring concerns, Aaron Boone and co. ignored reality.

You just knew it was going to come back to bite them.
Their relay throws were never crisp.
With how poor their infield defense was, Clay stood no chance at being a successful closer.
Fans knew that weeks, if not months before the change was made.
Somehow that was the only spot the Yankees decided to challenge him.
Anything away he didn’t have enough in him physically to attack.
That was ignored for some reason and instead of taking advantage of a hindered player, he crushed them.
Great analytics, boys.
The Yankees didn’t lose the World Series on talent.
Shohei did next to nothing.
Muncy was a zero.
Mookie didn’t necessarily terrorize them.
If you look at the stats on both sides of the ball, the series was pretty even.
They lost the series because of over-managing (Game 1), stupidity, and laziness.
Constant base-running and defensive miscues typically fall on the manager.
Those are not areas in which Boone emphasizes though.
They preach togetherness and unity.
I fully expect Boone back after this World Series appearance just because I know they like him too much.
You just lost a World Series because of that shit.
Just listen to smug Joe Kelly laugh at the term “Yankee defense.”
Everyone knows it except the guys running the show.
The Dodgers game plan vs. the Yankees was to simply force them to make baseball plays.
How does that not fully embarrass you as an organization?
The Yankees possess a very talented roster of undisciplined players who lack focus.
So much for that audit they were going to deploy to dissect everything they do wrong.
Brian Cashman, Michael Fishman, and David Grabiner are all to blame as well.
And it’s not like they had to do anything special either.
The game plan was to force the Yankees to make baseball plays.
That’s why the Dodgers are the champs and the Yankees sit here looking stupid.
So close to immortality, yet so far.