Boats have been removed. They were in the game for a long time, but due to the computer not being able to use them at all, and the maps having very little use for them, they were removed. The general philosophy since WoM release in regards to improve gameplay has been to remove any feature that would be difficult to fix. FE might have also followed the same philosophy, as I don't think it will contain a dynasty, minor factions, or boats. But that may or may not be true. I think it might be difficult to program boats. It seems like most games like this have had some difficulties with it, not just WoM. CiV V just eliminated the problem kind of by making everything a transformer, so a knight hits the water and then has a boat. Romance of the three Kingdoms did this in a few of there games too. Fans don't seem to like it much, I know I don't care for it as it makes natural boundaries too easily overcome.