Almost all of the UK's carriers had armored flight decks, which while protecting the carrier from bombs and shell fire it severely limited the number of planes they could carry due to the fact that they only had one hanger. US and IJN carriers had 2 or sometimes 3 hanger decks, but no armor. This meant they could carry more, but they were weaker in terms of strength.
We are probably going to see carriers with few planes but with a lot of hit points. Maybe a front line carrier class?