what the loving forget why
what is the purpose of this change
Apparently Valve wants people to be more helpless while they're taunting
For cases like the Demoman, he could be taunting for fun but have left himself vulnerable to an attack, but then he might be able to save himself by blowing up his stickies and killing the enemy before they can get too close to him
Now you can't save yourself while you're taunting, so instead of looking cool, you'll just look like a fool