Who said it had anything to do with A-Rod?
Any time a power hitter who has hit for average comes to the Yankees (majors or minors), this team winds up turning them into dead pull hitters to maximize the RF porch. In exchange, they strike out a ton and their batting averages plummet. I've already named 2 of them. The Yankees philosophically have to get off this bullshyt of "yay home runs, everything else be damned." As for DH, that wouldn't be as big of an issue except the Yankees are gonna need that spot for older broken down guys who are still gonna be here like Ellsbury and McCann (Ellsbury because he's untradeable and breaks down all the time and McCann because he's a 10/5 guy and they need to stop blocking Gary Sanchez from playing C moving forward.)
moving forward the team should roughly hopefully look like this
C Sanchez
1B Bird
2B Castro
3B For the love of God they need to target a 3B prospect with promise here
SS Gregorius
LF Judge
CF Ellsbury
RF ????????
DH Ellsbury/McCann until both are gone
now as I've laid this out, if you look at this team and you add Schwarber and you think Schwarber's the best guy of the bunch, you're gonna be in trouble, because they'll be building the same way they have for the last 6 years (play for the HR unless there's runners in scoring position, then we shyt the bed). So if Schwarber's going to put up the numbers many think he can (and I don't doubt the power), he better have a Papi-esque clutch gene. Otherwise it'll be some of the meaningless moonshots ever hit. Before they can worry about the Schwarber's, step their youngin game up and seek the next Rizzo, the next Bryant or Betts or whoever else (not saying them exactly, they're special players, but guys who do more of the things THEY do)