I have a question (have not played far enough into the game) But is an event / feature for the Czech Legion included?
I think it's quite logical that the Czar can make use of KuK prisoners if he can convincingly supports their independence, and it should be in the game.
This would be a lot like a "Recruit Prisoners" option that we already had in RuS. Just that the event gives not manpower points, but experienced troops. Somewhat experienced, ~ 1 star, but for a cost in war material ( the troops need to be armed after all / did not keep their Austrian rifles during captivity ).
Ideally this would be linked to the number of prisoners, and troops would appear turn after turn not instantaneously. But a simplified mechanism would work too. Event unlocked if number of prisoners is > X, costs E EP, M money and W war materials, event puts a new division on the map, locked for a few turns if you want, perhaps the event can be used again if requirements are met.