I for one don't consider carriers to be ineffective. True, it might help if ships could be bombed beyond 50% of their health, but still. As it stands, a few carriers in your naval taskforce can diminish losses by bombing. A strength 20 battleship is a lot easier to kill than a strength 40 one. You might lose fighters, but they can be flown in in only one turn, getting a ship to the other side of the world on the other hand... Also, air cover over ongoing invasions can be crucial, as well as the extra air support carriers provide. What I'm more interested in is how stealth destroyers will be implemented. Like subs? Invisible? Surely they should be visible to some units, but which ones? EDIT: A dutch steath destroyer. It's not too stealthy, but I think that's because a patch of ocean that doesn't reflect radar would attract attention.