I understand that developers are trying to make it clean and clutter-free, but this "Apple way of thinking" has it's problems like that you have to click through more menus to get what you need. HEX value is just convenient way of copying color around (not only in sw but also from other applications or web).
Personally I would be really happy to still see the HEX value in all color sliders or not having it divided at all. Photoshop has everything mixed in one window - it is not that visually pleasing, but it is faster to work with - which I prioritize. If you prefer to keep it the way it is now, I think there should at least be an option in Color Preferences