User blog:Lilyshirogane2201/Why Aikatsu and Aikatsu Stars characters didn't have their own lightstick colours?

After watching Aikatsu Music Festa I wonder''' Why Aikatsu and Aikatsu Stars characters didn't have their own lightstick colours? I mean there is 25 idols(Aikatsu!)and 14 (AiStars!), their image colour can be same but It's  different if we look more carefully. Does it because Bandai is lazy? '''