Lancer Skill "Leg Sweep" doesn't interrupt enemy cast until animation ends

This is really frustrating. It makes us feel like we while we didnt do anything wrong, we get screwed by poor design. Even though Leg Sweep is off global cooldown, I have to wait for the first animation to finish before the leg sweep animation goes and the stun doesn't even take effect until after THAT animation has completed! So the first skill animation lock is ~1.5 sec, leg sweep animation lock is ~1.5 seconds. So, if I use a normal skill, and the enemy begins to cast, I have to hope the skill he is casting is >3 second in order to have a prayer of interrupting and that's IF I have perfect reactions.

Chimera is incredibly frustrating due to this.

Yep is a pain, unless you have slow on if this happens you won't be able to cut his abilities, slow cant be kept up all the time and you can't stop dealing damage so you have to suffer it, solving or reducing an "issue" like this can be hard as is part of the game mechanics so probably the answer from SE will be a "Working as intended". Anyway this shouldn't keep you from finishing chimera as it is still doable.

Finally finished him after about 1.5 hours of wiping. This is definitely something that should be changed!