I feel like this could be an opportunity for more Hi-Levels, and possibly Superliner Is. If offered, SDP40Fs should be offered with equipment to go with them imo. So far, Superliner Is have only been offered in Railking and brass.
Hi-Levels appeared in Amtrak Phases I-III, some coaches made it to Phase IV, and the lounges went to Phase VI as Parlour Cars.
Besides appearing in Phases I-VI, select Superliner I coaches have appeared in Amtrak CA, and the Surfliner paint scheme.