They don't need alternate helmets, they just need to pick the better ones, Bills in Red, Rams in classic, Titans in White, Seahawks in grey, Patriots... silver works... Cardinals can stay in white.
Alts suck for the most part, and the season is too short to be mixing and matching. I literally stopped watching NCAA because of the nonsense, as I never knew who was playing who anytime I turned in on. Brand identify matters.