The Deathscythe EW shares the same basic inner frame most of the other EW kit's use with the exception of the Wing EW. The frame is somewhat simplistic, but it's very study and it offers some nice moving frame detail at the hip/knee joint.
The frame allows the kit a pretty wide range of pose-ability, however it is somewhat limited by the 'bell bottom' ankle joints.
Additionally the shoulder armor merely 'sits' on top of the shoulder armor, so it does have the tendency to come off without too much effort.
The V fin fits somewhat loosely in the fore head, it is also very delicate because of it's two part construction.
One other 'issue' to be aware of is that the Deathscythe and the Deathscythe Hell are (unsurprisingly) nearly the same kit. They probably share 90-95% of the same parts. The only differences being the fore arm armor, shoulder armor, and backpack. Both kits are fantastic, but each kit has pros and cons.
The Deathscythe has better balance because of the smaller backpack. The Deathscythe Hell's forearm armor sections can also limit the hand articulation.
The Deathscythe Hell however is arguably the cooler looking of the two designs. The Deathscythe Hell's wings have a wide range of articulation, they separate at two points, and the wings can be moved forward and backwards (almost like flapping). The articulation provides a ton of opportunities for dynamic poses.
Ultimately I would have a hard time picking between the two kits, but I believe I would choose the Deathscythe Hell. The bat wings and liberal usage of black and purples definitely appeal to me!