I think I agree with Shikijin. Isn't this what the Bake series is all about? It's best if the characters are on their own, for the sake of the characters themselves in the plot and the fans. I think it may actually be really interesting!
If Araragi doesn't appear, Tsubasa will have to deal with her stress all on her own.. and I believe this was mentioned somewhere in ep 15 of the anime.