Then you feel our pain. This is an exercise many of us have done repeatedly over the years. VIA is a lot like Amtrak - lack of a plan, political interference and strange budget choices, all while embellishing routes that don't need it while ignoring unserved potential.
VIA's service actually makes a lot of sense when you factor in the political climate of Canada in my opinion. It seams to me as an outsider that Quebec gets what Quebec wants because they know they have the power to sink any policy in any part of the country. Without Quebec's support things don't tend to get funded. Hence the corridor gets better service, and they are trying to do this higher speed line somewhere in that area. While the western provinces don't get service. The corridor has very useful service and CN for the most part manages to keep that part of the network fluid.
When I look at the Canadian rail map I see major potential in the prairies especially Alberta. Calgary-Edmonton makes a lot of sense for a Piedmont style corridor. I could even make an argument for twice daily service, a day train and an overnight train between Winnipeg and Calgary, and Winnipeg and Edmonton. Which is one reason I would want to use the HP2s after the new Siemens sets arrive for.
Sure they could run a 'Park' on each end.....but in one direction it would be separated from the Sleeper Class passengers it's intended for.
From the news release quoted above I think VIA has already determined the make-up of the Ocean in November with the loss of turning capabilities in Halifax. Now they're working on that re-configuration of cars during the Covid hiatus.......but the question remains.....will there be a dome??
I think VIA is looking for a simple solution for Halifax and just the requirement to run the units around to the opposite end be properly positioned to depart the next day.
I'm also wondering if they will reposition the baggage car also along with the units as the 'Second Engineer' handles the baggage car duties and this would be difficult if he had to go to the opposite end of the train.
I think looking at the utilization rates of cars you are unlikely to get a skyline much less two. The Canadian will always be the flagship. What would make more sense but be way more time consuming would be to run two park cars.
Have your consist set up as such.
-F40PH-3
-HP1 Baggage with Pass Thru MU
-F40PH-3
-Deadhead Park
-Coaches
-Food Service
-Sleepers
-In Service Park.
Then I'll list the switching moves. In Halifax I would do this in the yard off the Bedford Highway
Power Pack=F40PH-3, Baggage, F40PH-3, Park Car
1. Drop the rear most Park car on Track 1, pull the rest of the consist onto Track 2.
2. Drop the Sleepers, and food service cars on Track 2, then return to track 1.
3. Couple the coaches onto the Park Car on Track 1, before cutting the coaches from the power pack. Return to Track 2.
4. Couple onto the food service cars, cut the sleepers off the cut and pull the food service cars to track 1.
5. Couple the food service cars onto the coach cut, cut the power pack and return to track 2.
6. Couple back onto the sleepers cut, and drag over to Track 1 and couple onto the assembled consist. Make the cut between the Park car adjacent to the locomotive (Now the power pack is the two units, and baggage car).
7. Run around the consist on the now empty Track 2, and back onto the consist on Track 1. Then back into the station.
While its time consuming to drill the cars like this, it is a doable method to handle the problem they have. Of course the other method would be to use the Halifax CN Turntable to turn the Park Car. But you would still have to drill the train in the CN yard to move the sleepers and coaches to the appropriate locations.
The other method is to wye the train at Truro and run around on a siding. But that will add more time to the schedule.