I don't think CYF is dead tired in G2. It was definitely the coach's plan to let RI go full on attack and let CYF rests to get ready for G3. She has done it before with NO in the previous tournament. CYF is extremely fit, it looks like she's running out of gas but that was never the case. The Chinese camp knows well that RI's weakness is her stamina so the plan is to just retrieve which is CYF's expertise that's why there's a huge gap in their H2H. RI also had tougher opponents throughout the tournament, NO and AY are incredibly good at retrieving as well while CYF only played with ZBW and HBJ. They're no NO and AY.
I predicted choi to win simply because they play very nice in smashing and attacking. And defense with good placement and vision. The only thing beat them is nerves or mental. And they show that their mental is ready by winning ahsan
Congrats to the koreans, they played really well since the second game. cmiiw but I think fajri is the only indonesian pair that beat choi/seo this year.