That is probably the single most infuriating thing about biped, but still somewhat minor and can be worked around. The only thing that is weird about them is the naming otherwise they behave just like every other IK system out there, albeit in a much more streamlined fashion that reduces rig clutter. So far I have seen two…
That looks great! Only thing that really stands out to me at the moment is that at the impact, the projectile slightly misses the target, not sure if that's intentional or not.