We had ourselves a battle of Naumachiae to test some simplifications. There are some nice mechanisms that makes it a great game, but we are trying to scale down the book-keeping and make a large naval action playable in an evening.
We had a good game in the evening, landing on approx 5 hours.
The reason i like the rules so much is that they take in consideration how ships and fleets moved with communication limits and that speed and maneuver is crucial for success. I`m opposed to the idea that naval battles are just land battles at sea, and i think it`s important to try to emphasize the different tactical aspects of a land battle and a sea battle. So, that is why we simplify this good, but too complex game.