I like having Marwin's defense and versatility on the team.
As far as the team defense goes, I don't think it's quite as bad the 'errors' make it look. They look pretty bad according to one metric, +/- runs at -13. However, they are ranked 14th overall in defense according to Fangraphs.
Furthermore, they have a DRS of +11 and a UZR/150 of 6.1, good enough for 17th and 4th overall, respectively. The team excels in saving runs with their arms (2nd), they excel in saving runs with double plays (2nd), and are above average in saving runs with their range (9th). They fall short on error runs (23rd).