If this is a complementing thread, then I would like to congratulate ES on the boat idea.
I thought those original games were a little unbalanced wtih boats. I mean, a boat should really have as many HP as a building (and be as expensive). It's really silly when your elite cannon galleon loses to a longbowman, or your fast fire ship to a couple of knights.
But from what I've seen in the screenshots, the boats are a lot bigger (so I assume they have lots of HP). Also the idea of putting different units of the boat to make it change functions is also great.