So my main issue is that nothing is stopping you from building super densely, and then it's hard to cut your roads. Also the dense pattern means you can have tons of units created from a single castle, whereas having a more spread and less dense pattern doesn't give you as many soldiers, even with more castles. In practice if the opponent chooses to play lame there's little you can do. The SFX should also be capped; with a dense formation I almost go deaf in the upkeep phase.
That being said, it's a really cool setup for a strategy 2 player game.