Seems that some received the update and others didn't and the developers are trying to sort it out. It's easy to tell if you've received it By checking maximized 5* Fierce or Overwhelming talismans. If you don't have any you can check those of your troopers
Fierce pre-update ATK - 696
Fierce post-update ATK - 453
Overwhelming pre-update HP - 6977
Overwhelming post-update HP - 4527