True, but not as much as if they are rooted in place. I think shortening the stun would be a sufficient nerf to start with, plus they could always remove it entirely in the following patch if .4-.5 seconds is unbearable for people.
Assuming stagger was removed and normal ranged hits were not altered at all, they would still halt movement for the duration of the animation (presumably .5 to .6 seconds
if we can judge it based off of what's true for polearms).
It sounds silly when it's summed it up this way, but the whole issue is a matter of .4 to .7 additional seconds of stun that people are arguing over.