some of you might have already noticed this (thanks to those who did let me know). From today to 26.12., we are supposed to get 2x crew XP bonus. It however is not working.
I tested it myself. My Japanese commader did require 878 XP to level up (sadly I did not take a screenshot) of that. And when I played a battle:
A 207 point victory (I got oneshotted in the beginning) and 671 XP required. No double bonus.