If you really want to have usable flight deck space either side of the island then the best solution is to keep the island over to starboard (where it's supporting structure remains to the side of the hangar) and build an enlarged "Alaska Highway" to starboard as in the CVA-01 design. This can either be for aircraft movements, aircraft parking, or if it is made large enough as an auxilliary runway with ski jump at the fore end. Having multiple ski jumps in this theoretical carrier may seem attractive as CTOL ships have multiple catapults, but Ski jump launches are much less complicated the 'cat shots', and typically four Harriers can be launched from a ski jump in the same time it takes a CTOL ship to launch one fighter (ie 50 seconds). That is far from the whole story of course, as the CTOL ship will have four fighters in the air in two minutes and those aircraft will be supersonic with longer range than the Harriers and so can intercept an incoming raid more quickly. Ski jumps take up deck space that cannot be used to spot aircraft (unlike catapults, which are flush with the deck and don't interfere with aircraft spotting when not in use) so having more than one becomes harder to justify unless your ship is supercarrier sized.
At the end of the day the purpose of the carrier is to operate aircraft, and all other requirements must be subordinate to that. The flight deck is more important than the superstructure, and takes priority at all stages of the design process. If the need for systems (ie radar) and command spaces becomes too much then they have to be accomodated elsewhere within the ship or transferred to an escorting vessel. Only that which is essential for the operation of the carrier itself should be retained aboard, which is why carriers don't normally have more than self defence missile capability. Vessels that try to do more (eg Soviet Kievs, British Invincibles and Italian Garibaldi) can only do so at a cost to the air group. The Kievs gave a large percentage of their deck space to missiles because the only available aircraft, the Yak-38 Forger was so poor in performance and was only really there for display ("Look at us NATO, we have carrier aircraft too! Imperialist dogs! Oh, you want us to actually fly them? Er, not today thanks, I'm feeling a bit under the weather..."). The Invincibles were originally intended to have four MM-38 Exocet launchers fitted to the starboard side of the Sea Dart Launcher on the foc's'le as their design derived from cuiser practice rather than Carrier doctrine, so they have something in common with the USN Independence class of WW2. Even the compact Sea Dart launcher impacted deck and hangar space and was removed from all three in the late 90s, the space being plated over to provide a full length flight deck and increased hangar and magazine space below decks. The Italian Garibaldi was completed with four SSM launchers on the aft quarters (two aside) and these too have been deleted to provide more flight deck space for parking. Extra deck space is arguably the most important modification/enhancement that can be made to a CV design, and as 'Steel is cheap and air is free' it is also probably the cheapest upgrade relatively speaking. If I had had a and in the design of the new Cavour for exampl, she would now be sporting a large portside deck extension extending from the ski jump aft to the stern, providing extra parking space (and clearance for larger helos such as the Chinook so their rotors don't come anywhere near the island) and more internal volume for compartments, allowing the hangar to be widened. I'd do the same with the Invincibles, the Garibaldi, the Principe de Asturias and the American LHA/LHDs. I think the Italians have sort of got the idea as they have done so with their LPDs of the San Giorgio class when rebuilding them. Perhaps they will apply this experience to their two CVs.
