Shoot I think it looks great. Seems appropriate to me since the majority of ATI's tails have the prime livery.
I've never heard any ATI pilots calling themselves "PrimeAir" pilots just because our planes are in Prime colors, or the Prime livery is used as the profile. The Prime tail is an accurate representation of the ATI fleet. GoJet, Compass, Air Wisconsin and TSA all have aircraft painted in American, Delta or United colors in their profiles.