Why a well deck would compromise Invincible

How much larger would Invincible need to be to add a well deck for vehicles while retaining a similar air group?

Roughly 15,000-20,000 tons larger, with major penalties in speed, weight, and complexity.

An LHD can support aviation, while a primary carrier suffers when burdened with amphibious features. A well deck adds volume, weight, structural complexity, and arrangements that work against speed and aviation efficiency. Preserving the original air group and naval fit could require another fifteen to twenty thousand tons. America-class dimensions illustrate how quickly the hybrid requirement grows beyond the Invincible concept.