It's probably worth it at that price, but I think you'd be much happier with Ward of Succession at $19.99. Uses the Wars of Napoleon engine update, but without all of the tech tree and diplomacy cruft that broke the earlier game.
I would say that WSS is the best game AGEOD has ever produced, and, given where Slitherine in forcing them with their new engine, possibly the last decent one they'll ever produce.