One of the first things Steve Jobs on returning to Apple did was to cull what he felt were unnecessary products, and product groups. You could argue that Apple is large enough now to have thousands of products, but what was clear is that Jobs had the defining vision and no single person can have a single defining vision of thousands of products.
To use your example you cannot create a camera division and not allow inter-group communication because you are then building products in exactly the same way as someone like Sony. You end up with disconnected systems, nothing integrates together well and in-fighting between the groups.
I remember looking for a 32" Sony TV a decade or so ago, and there were 5 or 6 different models all at slightly different price brackets and with different discounts everything became muddled. Sony of course were simply capturing every portion of the market they could, from the person who wanted the cheapest to the person who wants the best.
I'd like to see Apple re-focus, make single models of iPhone, iPad, MacBook, iMac and the Apple Watch. Stop trying to capture as much of the market as possible and just focus on a limited number of highly integrated devices.