Rose gold is tacky. Just like gold is tacky, in my opinion. While I appreciate the need to customize and create options for the consumer. Rose gold and gold? Give me a break. Are these phones? Or are they jewelry?
It's just tacky.
I would have preferred Apple mix and match their traditional monotone colors/materials like: black, white, aluminum, glass, slate, spacegray, even a matte white (or "space white") option.
Imagine a phone like the iPhone 5S's design. Two panels at the top and bottom, a back, and a side bezel. You could mix these options into phones to create more options for consumers:
black and slate
all black
space grey and black glass
space white and aluminum
silver and space grey
silver and black glass
all space white
space white and black glass
and so on
From there, they could customize to their own liking (maybe Apple could have provided gold and rosegold skins for the phones, but at their barebones, they could remain neutral).