Shackman
I won't even raise the redesign of the flight deck assuming angled operations are considered essential.
You don't have to. Both STOVL and cat n trap options can be accommodated (and have been laid out) in the current design. There is below decks provision for catapults and arrester gear.
Remember that the cats on Vic, Eagle and Ark were also a lot shorter than the C13. G limit is normally 4 - 4.5 for launch from HF considerations