I would counter that they need more actual colors and they've already done red twice. Nearly the entire current line is shades of grey.
They currently have (and no offense intended here): white, white, grey, lighter grey, black, basically black, basically black, brown, and red.
I'd like to see some kind of blue (Aston's Cobalt Blue, for example), at least, or maybe a stand-out color like a copper or dark orange.