.Spartan over at twcenter has done some pretty extensive testing with the navies. He basically found that by increasing build times (+75% I think) and reducing defense values you could get around the "mega fleets" problem.
http://www.twcenter.net/forums/index...howtopic=11196
I still feel that the navies need to be redesigned (remove some of the bigger ships, maybe use a fleet concept?) but this works fine until a better solution comes along.
Also check out his AI changes (both are included in the D/L on the first post, they are designed to work with the Total Realism mod though...)
Hope you dont mind me posting here, just wanted to point out some things that might save you some time and testing! :bow: