Recently I am seeing that the when I log on after a reset I don’t get the x10 multiplier on all the Challenges. Also if I don’t complete some of them in a day it is not accumulating as the “catch up” mechanic you mentioned. This is going to make it practically impossible to complete the Battle Pass in time!
Also, during one of the live streams before release you said that you expected it to take around 2 hours a week of gameplay to keep up with the Battle Pass, this doesn’t look like it will be anywhere close to being correct with current settings.