Those things are useless. You know the double jump effects? They need to really buff these things or get rid of them. What do you think?
In more detail, I mostly have problems with the glide mechanics. It sometimes seems unsmooth, especially with canceling the glide. Also when you miss a platform by an inch maybe have an option to pull yourself up as suggested below.
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The Hunter's double jump is great. The other two are not nearly as good, especially in pvp.