You can press RT + X when your tiger transformation is fully charged and the tiger goes crazy it like let's him dodge and attack crazy fast etc. And then the damage output is much higher! If you didn't already know, that is...
If im not mistaken you missed the frog boss fight in this chapter, its located above a shrine. Basically go to the shrine thats right in front of the first zhu bajie fight where you first meet violet spider and her daughters are preparing for a marriage, as soon as youre at that shrine look above and youll see some green will above you, climb up there with jump heavy attacks and follow the path for the frog boss fight
Honestly would recommend upgrading your drink a bit so you can get more health per sip also going back for missed pills and upgrading armor and staff chapter 5 gets a little more intense
The woman the crane was talking about was the 4th sister ( the one who'd been helping you and inmplied to have been in love with a destined one) you broke the talisman barrier keeping everything in the cave where the court was using the inhabitants to make pills. So he turned her into a pill to stop her ambitions and to use against the destined one should he do a wukong on go against the court. Alot of people think its gonna be a dlc plot line
if you fight all secret bosses in each chapter than go back to the 3rd i think... whichever the baby was in, you'll unlock a better ending. Boss Rush pt2?