If I had to guess, they talked to Nike and didn't come up with anything they were enamored with. And the guys wanted something new. And the attendance numbers were looking bad for the opener. So they just went with an easy change.
Just seems weird that they tell us "wait a minute, blue isn't even an official color," and get people fired up about platinum, then give us more color that isn't even official while removing official color. Ya know? There should be more continuity between brands (football/bball/lacrosse).