If you want to get in contact with idols during TIF without paying for it, just go to Market Square. Met a lot there either distributing flyers or selling stuff personally. If your fan of Arc Jewel Girls, like me, this is the perfect place. There were lots of others, but no one I care much about.
I only walked by 2 members of Predia outside. Otherwise the idols there were unknown to me.
Chu-Z have too many different styles in my opinion. I love their sound in Bombastic/Brand Boy, but like you I am disappointed with Tell me why. At least it gave them a high position in Oricon.
PASSPO's graduations didn't bother me by the members involved, but that the one of Sacotee happened so fast after Makochan's and was rather unexpected. I am curious if it will just be a hiatus.
If you define your Passpo fandom by prefering Nachu, you will have a hard time. I get that. Her behaviour is difficult, especially when compared to Morishi or Yukki. As I am not Nachu's major fan, I can live with it and even had some fun with her, as this time she was the member I had the most direct interaction with.