Groenewegen did play 1B when not pitching in 2014. If you recall, she was hurt on a play at first in the Oregon super-regional and was unable to pitch (or play at all) in Game 2, and Oregon rolled to the sweep. That might be one reason why Allister didn’t play her in the field again, only DP.
We don’t know yet how Ritter will handle Schwartz, because she’s never had a two-way starting pitcher as a head coach. A lot depends on how integral she is to the pitching staff and whether or not we have a player who can’t hit but is very valuable on defense, who could be a defensive specialist.
Northwestern hasn’t hit Danielle Williams this season after letting her do dual duty, including playing OF, for most of her career. But they had more pitching depth in prior seasons, and this year they added Nieto at 2B which allowed Lewis to go to RF, where Williams had played a lot when not pitching. If they hadn’t added Nieto, we might have seen Williams hitting and playing RF at least part time. But with so little pitching depth behind her, I’m sure the coaches are happy they didn’t really have to consider playing her in the field this year.
So roster and circumstances will probably determine how much time Schwartz sees at a defensive position. If it were me, I would prefer to DP her if she is good enough to hit and she is pitching serious innings.