Backdash Cancelling is no longer required to Backdash into Block.
From the video description:
In previous games, letting go of the second back in a backdash would prevent you from blocking unless you cancelled the backdash. Now it seems that no longer applies.
In other words, this makes back-dashing for creating space and blocking in reaction to an opponent's attack much easier to defend against now that you don't have to cancel the back dash with a crouch. Thanks goes to Bloodhawk for the finding, check out the video he put up on this below.
BloodHawk ≫ https://www.youtube.com/user/BloodHawkTR