Hi krases.
I'm sorry to disappoint you, but my first, initial thoughts on this were in fact, a whole load of questions. sorry matey
But to get the ball rolling, may I please ask what year, or even what decade are you thinking about
Have you thought about night combat? what happens if your radarless, gunless carrier is caught just as the sun is setting? You might be able to launch aircraft, but could you retrieve them? Guide them home?
What about inclement weather, when launching aircraft is not an option? Rough Seas and/or strong winds? Driving snow, or fog?
Personally, I think a pure flat top would be a very, VERY bad idea.
Andy.