Once you hit max level, you begin earning champion points. In BGs, and other No-CP content, you are then placed against other players of max level between CP0 to CP810. However, gear continues to scale up to CP160. If you are less than CP160, you are at an immediate and substantial disadvantage, which is fine, no one really complains about this because you continue to build your character up to CP160. Once you are CP160, in No-CP content, you are identical to any other player. Therefore, effectively, No-CP content already requires CP160.
So, why not allow the use of 160 champion points for "No-CP" content and rename it "Low-CP". The intent of No-CP content is to limit the power creep long term players have over new players in competitive forums but to be competitive in the first place you already need to have 160 champion points. Having access to even 160 champion points, due to the way they scale, would be very beneficial for character build diversity, as now a lot of gearing options are more rigid due to not having access to these champion bonuses. I agree with the implementation of No/Low-CP for BGs and the option for Imperial City and Cyrodiil because I agree it is important to have a fair forum where players aren't subject to significant advantages that others may simply not have time to reach (CP810), but every single player who is competitive in No-CP is already CP160.
TLDR: Propose to change No-CP to Low-CP (160 champion points) as gear scales to CP160 anyway, allowing for increased build diversity.