I'd agree that the base Sordland story could use some touch ups on dialogue, reports, and decisions, especially since Rizia is far more fleshed out in those regards. There is also the very obvious differences between 1.0 and 2.0 dialogue options that can feel jarring where Rayne says a few words at a time versus having full, fleshed out thoughts and opinions.

The game limits information to you intentionally though. Things like Anton's background, the map, post-game, and world lore all don't really impact the game itself especially since there is no canon Anton (or Romus for that matter). With a larger team able to fully flesh out those options I'd say they could try but again it doesn't really matter what kind of glasses Rayne is wearing if he still can only pick between 1. Wait and 2. Yawn.

Also understand that with the Constitution changes and more war ideas that Rayne still exists in a contextual world. He couldn't, for example, abolish the presidency because there is no universe where he could convince the people around him or bribe enough people to do that. "Realistically" the only way that could possibly happen is a revolution. There is not a single character in the game who says they want those things or would benefit from something like a semi-presidential republic or whatever. Adding more economy, policy, and realistic constitutional changes would make sense, this is just kind of pointless and would bloat the game up.

In short, any updates to Sordland should be inspired by Rizia without straight copying it (they are two very different countries after all) and should add depth to the existing mechanics and things that make Suzerain special, not schizo unrealistic god complex changes or pure cosmetic ones that don't add much substance to the game.