How effective might navalized Beaufighters or Mosquito-like aircraft be against Japanese carriers?
Short answerThey could mission-kill or destroy early Japanese carriers because their heavy mixed armament would strike unarmoured flight decks especially hard.
NotesThe counterfactual assumes carriers large enough to operate navalized Beaufighter-type aircraft. These aircraft could combine torpedoes, rockets, bombs, and substantial fixed guns in one strike platform. Japanese carriers before Taiho lacked armoured flight decks, leaving flight operations vulnerable to this mix of blast, fire, and structural damage. Mission kills and possibly sinkings are therefore plausible outcomes, rather than a marginal improvement over ordinary attack aircraft. The idea previews the later Admiral-class discussion by showing what larger British carrier aviation might buy operationally.