Mountcastle rates better at first base defensively and I think he will only get better with time (-3 DRS vs 0).
I don’t understand the take that certain players shouldn’t be used at DH. It’s about having a better roster 1 through 26 and using everyone more often.
Fair enough although DRS is far from the end all be all.
A better roster from 1-26 precludes below average hitters from getting time at DH because there would be better available hitters for those at bats.
If we have a starting middle infielder that plays good defense with a 90-95 OPS+, he should ideally play 150+ games at his position. For those games that he's resting, just let him rest while Mountcastle or Mancini or a corner outfielder that is an above league average hitter gets those DH at bats.
I'm all for what you're talking about if the O's actually end up with good to great bats independent of position at let's say four of the following positions: C, SS, 2B, 3B, and CF, plus a good depth of bats at the traditionally strong hitting positions. I wouldn't plan on that though. Make these guys prove that they're good enough hitters to push someone out from 1B/DH that is a legit good hitter.
For instance, when we actually had hope for Chance, I was cool with the idea of having him and Adley with each of them getting plenty of rest from behind the plate while getting some time in at DH. So all good with having the DH slot more available to various guys, but this example is also why you don't plan on prospects earning those at bats, and Sisco was a higher rated prospect than most of the guys that may don an O's jersey in the next two seasons.