LOL Dave.
I love her elementary school pics.
I don't know, URPI, I think her sched is already very busy. With MuCore, she and Fany probably have to go prepare themselves since morning then the show ends around 5PM, and I think they might have a meeting during the week at MBC for the show too. With IY, it's recorded every other week, each takes like one and a half day or so, with all the travelling and labouring, it leaves them very exhausted the next day. Then there are music shows for the album promotion, each show takes just about as long as her MuCore MC job, I think. They have to go early to rehearse and maybe prerecord the perfs, then stay till the shows end. What else? Oh, encore concert preparations. There are gonna be new perfs for sure, so they need to practice those, which probably happens during night time.
Now, that sitcom will air from Mon-Fri. That's like Yoona's sched during YAMD, remember how we'd barely seen her? And then, Yoona didn't have album promotions, MC jobs or any TV shows she was a regular in. If Yuri took it, it'd be like that Yoona's sched times 2.
It's all just bad timing. I think Sooyoung just lost her Sweet Night gig too because of the sched. Sooyoung's sched doesn't seem as busy, but I guess maybe they record the show during MuCore/MuBank/Ingi orsomething, those shows she cannot miss.