You've basically got 2 years of Rule 5 candidates in one class this year due to last year's draft cancellation, so there are tons of tough decisions around the league.
The Nats don't have many. Virtually nobody on that list is a candidate to be picked, especially given the talent around the league. They would be much better served keeping a spot or two clear to grab someone or someones from another org.
Yep, seems an ideal time to identify some who may have fallen through the cracks.