completely agree, this is what has always been missing from sins. Destroyers and Battlecruisers need to compliment the larger heroe ships. We need to get to know the smaller capital ships also. But their really are none to speak of.
Problem is I think the smaller ships are supposed to actually do this now and be destroyers and battlecruisers. They just don't look big enough to be those ships though and don't act like capital ships. They all act and look like corvettes or support ships with a single main armament up until the heroe ships are built.
I have always wanted to have a proper fleet. But the Kodiak and others like it have not looked of felt in any way shape or form like anything other than heavier support vessels. Remember that in most fleets that have ever been the flagship may have been one of 50 or more capital ships all the same size. Think of Jutland. The largest capital ships are never too much larger than the others. An example of this is the flagships in old roman or rennaisance galley fighting.... the flagships were massive, but they were also complimented by many others approaching their size. The most they would have been would be twice the size of the larger standard line of battle ships.