I'm not a big fan of love triangle and rival stuff. I think the story was nice enough with just Tadano and Komi (And, well, Katai, but he's more a joke than a serious rival).
I hate when new characters butt in the current romance. Although I was afraid Katai would try to win over Komi-san that didn't happen, hopefully the gyaru will still remain an irrelevant side-character.