User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-4563270-20150224205413/@comment-3253026-20150224221353

If they made element phials and other garbage that could KO that would be way too strong. Element phials already put in work on monsters that are weak to the element being used. Adding the ability to KO stuff on top of the high elemental damage they already do would literally break the game.

Explosion phials work fine as is. They generally have a higher raw than elemental which makes up for the lack of damage in the phials and even makes them better if you're getting a lot of stuns. Watch some speed runs of dudes using charge blade. Majority of the time they're running explosive. The weapon itself does heaps of damage on its own plus the massive KO damage that the phials put out lets you wail on things when they're stunned. It's really not too hard to hit a few discharges on a monster's face. You don't want to dumb down a weapon that can already work well in the hands of someone brainless.