I don't understand this power in its current form. On a brute it's a tier 8 power, but it does less damage than a tier 3 power vicious slash, even with the added dot. It has no control or added benefits unlike vicious slash which has a knockdown component to it. It is also a blood frenzy spender, which makes its utility much less prevalent for the set as a whole as well. The choice of whether to burn blood frenzy on this or not just isn't powerful enough since stacks of blood frenzy bring better benefits; it's barely slightly better than maiming slash honestly in its current form.
So here are my suggestions for fixing this;
First off, Hemorrhage just needs more upfront damage. It has no perceivable utility outside of it being this big wind up hit right now (long cast animation and recharge). It currently does the same damage as a power that costs half as much, nearly casts twice as fast and has a much shorter recharge time in the same set with maiming slash, and yet maiming slash has the ability to debuff the targets movement speed. But it needs a bit more than this to make it useful.
I would add in either a knockdown or knock up component, or give it the ability to reduce the targets lethal resistance for a short time. The bleed component can stay but there needs to be more to this power as well. Something to make it worth burning the blood frenzy on a real choice of whether to save or not.
Rending Fury, the other spender in this set, grants wider range making use of blood frenzy a bit more palatable in the set. Maybe when you burn 5 stacks of blood frenzy with hemorrhage you can give this power a cone affect that inflicts bleed dots on nearby foes as well.
So, TLDR - up the powers upfront damage. The cast time and recharge are too long and endurance cost are too high to comparable powers within its own set.
Give this power an effect as well. A knockdown or knock up effect would be preferable to go with the animation, but lethal and defense resistance reduction would also fit the theme.
Finally when spending 5 stacks of blood frenzy, give this an additional component besides a slightly longer dot tick, such as a small cone AoE effect to go with the nature of throwing all that anger into one all or nothing shot. This power should not be less effective than a tier 2 or 3 power that have way more utility.