My theory (partly) is that they worry about some talent leaving; I was always certain that Nanami Tanabe would debut, for instance, but then time went on and on and she never did, and then she left - not long before all these new chances popped up... It's possible that she simply decided she wasn't interested anymore, but I wonder if the agency also realized they can't just let trainees wait year after year if they want to bank on them... I don't know if Tsubaki Factory has any such 'high value' members that this group needed to debut NOW, but I thought Kobushi Factory was strongly for Hamachan who has also auditioned about a billion times and never made it until now... Murotan almost gave up until she heard of BK going on hiatus and thought there might be a chance in the near future (and now she's in ANGERME). The agency isn't telling the girls "oh there might be a chance coming up in 6 months" so it must be stressful for the trainees, but also risky for the agency to keep them in the dark, like "oh we are totally going to have her debut, but not quite yet". But she can't know this, she has to live in uncertainty, and sometimes it just takes too long.
I also wonder if with the Factory thing they are testing out a new sister group system that they've previously had with Morning Musume, Country Musume and Coconuts Musume. Except with a much more even starting ground because there's no way Momusu's sister groups ever could have lived up to them lol.
I admit that even if I'm excited for the girls and freaked out a little when I heard Kisora (and Yumeno) are debuting, I'm a bit underwhelmed by this announcement because there have been so many new additions and groups in such a short span of time. We've already got the feeling before that UF* is really going full steam ahead right now and yet another group reinforces that image, but it's almost like idol inflation. I actually hope they stop here for a while lol.
With that being said I will eat up any and all new stuff about this group because I love n00bs and I really like the line-up.
But damn there are so many newbies to get to know!
I keep wondering which members to put on my sig because my favs keep changing. I mean it's an unimportant problem, but it speaks of a confusing time in the fandom. Haha.