Command:Drop lets the barbarian drop his weapon, not fall prone.
Sure, if he saves, he'll have the upper hand, but how many barbarians have a 50% or higher chance to win a wisdom save against DC13 or 14?
Ah true, my mistake. For most it'll probably be like a 35-40% chance of success. Hopefully the barbarian doesn't have an extra greatsword/axe strapped to his back :P
