SE4: Point defense ships, like in WW2. Good idea?

[PvK]

I've had success with PD ships, though I don't always use them. With their huge to-hit bonus is stock, they often don't need Combat Sensors, which saves 400 mins. Sometimes I even make micro-fleets with PD ships keeping formation with non-PD warships, but that's when I'm having too much fun micro-managing (but it does work).