I'm at 50, and so far I can agree with this. It doesn't have the HP or the umph behind the hits a Warrior has, unless you are using Dark Arts on a Souleater, and so happen to crit.

Problem I'm encountering right now is MP starvation. Save for Blood Price, which is only useful when you're getting hit a ton of times within that 15 seconds, your only other way to recover MP in Grit is Syphon Strike. However that recovers a pretty pathetic amount.

With so many of their skills being reliant on MP (Dark Arts, Unleashed, Unmend, Dark Passenger, hell just enabling Grit costs MP) there is too much to use MP on but too little ways to get it back unless you spam Syphon over and over, fighting against the Darkside MP drain. (Though I'm sure it's intended use is as a burst stance)

Basically, I find myself rarely ever using the Power Slash combo, and instead am constantly fighting MP decay in Darkside, using Dark Arts for heavy hitting Souleaters.

But of course this is just at level 50, wonder how things will change at 60.