For years a stack of WW would be removed with the first hit of Rampage. This would remove a stack at the start of the GCD and mirror the function of all other abilities. This felt like smooth game play.
This may have been through the efforts of Weak Auras only (I honestly don’t know) but it made the decision making of when you pressed your next WW for new stacks very smooth.
With the change a stack of WW is removed on the last hit of Rampage or at the end of the GCD. This makes the removal of a WW stack feel delayed or bugged since it does not match any other buttons.
With the delay players may be sending RB, BT or EXC into a pack of mobs without a stack because the buff will show 1 while you are processing your next button.
Rampage removing a stack of WW on the last hit does not feel intuitive.