I could see this team having 5 positions filled by players on a 2 war or better pace or by a callup who should play at that level (Abrams, Garcia, Winker, Wood, and the pair of catchers). There still would be DH, 1b, RF, and 3rd base. If 2 of those players turn their seasons around (say, Thomas and Senzel), it's not that tough to patch 1 more spot without impacting the system. The patch might even be from AA.
I agree they don't trade a top 10 prospect*, but they don't have to.
* yoyo could become tradeable if House locks down 3rd. The easiest spot to get by without a prospect is 1B.