
Realmuto is on pace for 7 WAR in a park that is god awful for hitters. Take him out of there and his .329/.393/.592 away split becomes even more valuable.
Since Marlins Park opened in 2012 the Marlins have had:
A higher batting average at home 3 years
A lower batting average at home 2 years
The same batting average home and away 1 year
Marlins Park is only bad for Home Runs. It is a big park and many balls drop in for hits that would be outs in other parks.
Realmuto hits better away, Stanton's number were almost identical home/away. Ozuna was better at home.