This season I don't put too much stock into team stats, especially when projecting playoff performance.
Yermin Mercedes (262), Adam Eaton (219), Zach Collins (215), Nick Madrigal (215), Danny Mendick (186), Jake Lamb (131), Billy Hamilton (120), Sevy Zavala (104), Jake Burger (42), Romy Gonzalez (20), Nick Williams (13), and Luis Gonzalez (11) combined to account for 28% of the team's plate appearances to date, and these guys will account for either zero or a very minimal number of postseason PA.
That said, I do think the groundball rate is way too high, and just my perception from watching games is that the 'A' lineup is just as guilty as the guys I've listed above.
TA, Leury and Eloy are really, really bad at both average launch angle and GO/AO ratio.
On the flip side, Moncada, Grandal, and (surprisingly) Goodwin are much, much better at both, and they're also three of the more patient hitters.