As it regards the grey...
For better or worse, black, white, 75% grey, and 30% grey are considered main colors by UNO's official branding guidelines.
Red is considered an accent color and can't be used for the majority of anything (Chris knows how much I liked the "Red Baron" jersey of the past).
I'm assuming these are the 30% grey.
I like grey. I know some disagree with me. A lot of people find it bland.
I like the new third jerseys quite a bit.
I also agree with Jim that the bull should be on all three jerseys (at the very least, the home jersey). It looks good on a jersey.