The best thing you could do is write a thoughtful letter to Craig Federighi with you ideas. He'll read your letter and consider your ideas. And write you a letter back thanking you for taking the time to write.
"a few ideas that are totally possible but they'll never do because they're conservative and only care about profit margins:"
Yes... Apple cares about profits, as all successful companies do. But they also realize the path to profits is only possible by developing/manufacuring/selling outstanding products that people love to purchase and use. Apple manufacturing and selling 600,000 iPhones per day, every day of the year, for their 1 billion active (and repeat customers) is evidence that people love Apple products.