It’s always dangerous to boil a corporations performance, so dependent on hundreds of people as well as external cultural, political, and economic forces, down to one person, but… without Feige, Disney would be in a much, much, much worse situation and the cracks and flaws in the company would be far more obvious. It’s only a slight exaggeration to say he’s as vital to the health of the company as Walt was in his last decades. When he steps away (hopefully not for a long time), Disney’s fortunes will change immensely.