Disarm Skill - Useful, but is it worth the trouble?

[Ashimar]

As a Warrior in my perspective. This skill takes a very long time to up. Right now its at 32, and i've been working on it ever since it became available. Most of the time it never works, and you can only do it to mobs who are using a weapon. When you do try it, it will usually fail, and it never seems to get better.
At this rate, i dont think the skill will ever be maxed unless every mob encountered is using a weapon.

Is this the same for everyone else who uses this Skill?