I've played against an FDR about ten times. Only one seemed to be particularly useful, getting a few strikes on "Ocean." The other nine times? Not even super unicorns seemed to be able to do anything with it.
Having not played it, I can't give an accurate testament on whats wrong with it, but I'd guess the plane concealment is too low and the alpha strikes too low. From a design perspective it sounds like WG wants to make it the "Shimakaze" of CV's, except it's strikes are, while higher than normal CV's, not as powerful as a Shimakaze torpedo strikes and it's planes can be spotted from 8 miles out. That, coupled with being unable to deploy patrol fighters as well as other CV's with faster planes, means its probably impossible to balance unless WG raises its alpha damage and increases concealment, which they're probably unwilling to do lest they enrage the playerbase. One could argue though a player's experience of getting dev-struck is actually preferable to getting repeatably struck in twelve, fifteen attacks by current CV's, and tortured to death over a four minute period.