To be honest, all this "It's a sandbox, don't raliroad it!!!" white knight rhetoric is just a poor excuse for lack of country-related flavor. Before you'd say it's a sandbox, you should understand, that there is a historical background for every country on the map. So, for example, things like serfdom issue in Russia, Great Eastern crisis or Peking convention that were mentioned above have a very deep centuries-long historical background, you can't just ignore it and pretend it doesn't exist. Nobody is asking for railroaded scripts, we need flavor. It means, that you still have a freedom of choice what to do, but your certain actions are accompanied with some events, journal entries and other stuff unique to the country you are playing. So, a few flavor for Russia when you trying to abolish serfdom law or engaging in a diplomatic play with Ottomans would not railroad your playthrough but make you feel that it's really unique comparing to other countries. The current gameplay when you just waiting for a successful dice roll that would abolish serfdom for you is not a unique situation (tm), that's what literally every other country in the world has.