[tinkthank]

Nice mod!
The replacement nation does indeed seem quite powerful; sirens are an excellent touch, and also happen to be an easy way for Oceana to expand in coastal provinces early-game. What is interesting about them is that if they fail to lure an enemy commander, nothing happens! It is a "no-risk" assassination attempt. That seems pretty tough. Methinks almost a wee bit too powerful.

I like the fact that the underwater units all have strat-moves of 1 -- finally!

I think Oceana is certainly more interesting and powerful, at least at first glance, than Atlantis. Water and nature, what an interesting combo!