Oh yeah, Yoko Taro also loves putting important relevant stuff in whatever side piece of content he can. I think he does it because he actually enjoys it or likes adding stuff on after the fact. Like he genuinely likes doing it and does it on purpose.
It doesn't feel the same with Nomura. Don't know how to explain it. Maybe it's because Nomura is less vocal and openly goofy compared to Yoko Taro in public or something.
Yoko Taro is like "Hee hee hee, I'm going to make everyone cry during the concert and its' gonna so fun! Little do they know, everyone will di- oh this 2B cosplayer wants me to sign her thigh??? O-ok"
Nomura SEEMS like "I will add a little here and a little there to keep everyone's interest since it will be a while till the next installment. This should pacify them for a little while."