Jose is not near the top of the league in barrel%. He’s in the upper half though.
Where Abreu (and Grandal) stand out is the difference statistics - subtracting their expected numbers based on their contact profile from their actual numbers.
For wOBA - xwOBA, Abreu is 9th and Grandal is 15th. For slug - xSlug, Abreu is 3rd and Grandal is top 10.
Now hypothetically the expected numbers being that much better than the observed numbers would signal guys who had been unlucky and whose performance could swing the other way.
However, this year we have a complicating factor, the ball. All of the expected statistics I checked require a calibration- statcast measures launch angle, exit velocity, etc, but those numbers need a conversion to torn into expected stats, and that conversion will be based on what has happened in previous years. If the ball changes, then that calibration will be biased.
It is possible to probable that some players will have batted ball profiles that make them extra vulnerable to the new ball. Could that be Abreu and Grandal? Possible, do not have enough data to speculate further.