Viewliners. Single level equipment is the entire point. The Cap is/was Superliners, the Star is single-level (and must be to use the Hudson River and East River tunnels in New York.) By truncating the Star at DC and combining it with the Cap there, either single-level (Viewliners and Amfleets) or bi-level (Superliners) would work, but they need more Superliners for the western trains and there is a slight surplus of single level equipment at the moment. That is part of the reason for combining the trains: the Cap Limited Superliners can go to the western routes which need them badly. (The other part of the reason, the one emphasized by Amtrak, is that the Star will no longer need to use the East River tunnels to turn in New York. One of the four East River tunnels will be closed for several years as they get rebuilt one at time, a process that is just about to start.)
All the sleepers have toilets in the Bedrooms and H Rooms. Viewliner 1 Roomettes have toilets. Viewliner 2 and Superliner Roomettes do not have toilets and use shared toilets down the hall. They will use an unpredictable assortment of Viewliner 1 and 2 on the Floridian, so the answer to your question is unknowable. Once the train starts running, people here will almost certainly post about the actual consists, and maybe a pattern will emerge, maybe not, and any such pattern will almost certainly change without warning as equipment is substituted due to breakdowns or for scheduled maintenance.