Dragon Slash—Boost should be directional (like GS Whirlwind).
It is frustrating to use, as in its current form it gives you poor control over your own character. Say you've entered Dragon Trigger and are about to use Boost, but a mesmer pulls your target side-ways the moment you press it. Your character goes flying off in an unintended direction. Even worse if you go flying off a ledge you had no intention of even moving towards in the first place.
Or you're in Dragon Trigger and charging up before using Boost, but the thief you're fighting pops stealth. You have a good idea of where the thief is, but because you no longer have a target, you have practically no way of directing your Boost. And if you try to rotate your character in place, you automatically break out of Dragon Trigger and your charges are wasted.
Dragon Slash—Boost is frustrating and clunky to use in its current incarnation. Please let me have control over my own character.
In fact, the specialization would benefit from having all three Dragon Slashes be direction. But it is especially true for Boost.
