Aerial attack comes out very fast and has a wide vertical hitbox. This makes it very easy to hit enemies both on the ground and the air, and then combo into a jump attack by holding down the melee attack button while airborne to make use of its large knockdown radius.
Although it's stated attack speed is only 1.0, it has a shorter recovery time between swings than the other two-handed weapons, so its actual attack rate is better.
It seems to have new stealth attacks. The position the camera changes and the image is blurred (checked with Leaper, in Charger the stealth attack no changes).