The current verison of it only rotates colors every second, so as to fly under the radar of both server latency and anti-funky shirt mods.
It rotates every second because that's all the update avatar serverCmd allows
It looks bad and tacky, yeah, but If you need an add-on to kick people for it you're probably the type of person who gets annoyed at everything.
Has anyone actually tested and proved a statistically significant increase in latency as a direct result of using this add-on? Or is it just "I want a valid reason to hate this"
Because I don't imagine that an avatar update once a second (or even more) is even remotely comparable in resource usage to what's needed to run the rest of the game.