In competitive, thief can strip your stability, even the 10 from dolyak stance, and just headshot you or thief steal you and cancel your dragon slash before you can even begin to charge it. The entire concept is flawed in PvP. One way to salvage it would have it charge much, much faster. In PvE the entire time you're charging you're doing 0 damage. The payoff for the dragon slash doesn't make up for the lost DPS. So again, reducing charge time seems pretty important for this. Even using the GM that cuts it down to 5 bullets is too long, and reentering dragon trigger is insanely easy to cancel. Again as a competitive player, it is absolutely unusable due to how much CC is easily accessible in the game, and how much boon strip (for stab) is available, since it strips the entire STACK of stability.