If the Japanese had attached a light carrier or transferred the air crew of the carrier ShÅkaku to the Zuikaku and allowed it to sail with the Kido Butai the results of Midway would have been different. The balance of air power would have been in favor of the Japanese.
The Japanese violated principle tenet of warfare by dividing their forces. They could’ve brought Junyo & Ryujo down from Alaska, and even brought Hiyo over from the main force far enough to support Kido Butai. Thats another 60 or 70 aircraft at Nagumo’s disposal.
But then again the Japanese main failing throughout the war was over complex planning.