Out of Body: the skill animation throwing the spirit away of the body is pretty terrible, making you wasting too much time to reposition yourself to the enemy location. Using this skill is already harsh with the current latency issues and the small hitbox, so giving more control on the cast animation should be the first thing to improve this skill.
My suggestion is making it possible to cancel the thrust in case the player move in the middle of the animation and gain control of the spirit before the animation ends. Another option would be throwing the body backwards and keep the spirit at the casting location, but I would rather see my first suggestion or something like that.
Astral Body Explosion: the only problem is that the cast animation is too long and unpredictable. Sometimes I get stuck for 2 or 3 seconds before the skill works and damage the enemies.
Not sure if this skill should deal instant damage upon pressing the key, but this skill already has a condition to be used (spirit form), so this long stuck on casting animation with the initial condition makes this skill really forgettable on most situations.