It's your game but in my experience delays can be costly. I feel asking the players of major powers for everything would be a logistical nightmare. Perhaps only ask them if it involves their interests strongly? What would Russia care what cantons Switzerland have but if a player wants an independent Finland then that's very much relevant, for example. 

On the other hand I thought of a differentish Switzerland idea: The United Cantons of Helvetia. A federal presidential republic where they managed to push religious freedom through. Official language is cantonal authority but federal duties usually need both languages. 

BTW, what happened to Prussia after Napoleon squashed them? I may be blind but don't see this mentioned. Did their lands get absorbed by the nearby German states? They still exist but shadows of their past glory?