With three additional cars on the property, V-II's could be assigned to 50-51, Cardinal. One would be a protect at Wash.
I wouldn't get my hopes up on that. The Cardinal is one of the most neglected routes and I just don't see them putting the nice and shiny equipment on it anytime soon.
Of course, the "flipside" to that would be, first, the AmCafe lost at Kayce "ain't a comin' back", and secondly, Amtrak is still "experimenting" with the delivery of F&B on the LDSL's. Having a "tryout" on a lower volume train like The Cardinal, will enable them to see if F&B for everyone - purchased Snack Bar fare and the "Fresh and Comtemporary" for the Sleepers, can be efficiently handled by, say, one LSA. It appears that handling food for Sleeper passengers is within the job description for the SCSA.