I hope i am not overlooking the feature but it would help a lot being able to specify IK chain length when setting up IK, currently I am doing as in the attached picture to be able to continue the chain with FK.
Another helpful addition would be having a boolean for IK/FK like blender so to better organize more complex skeletons
**EDIT**:
Would also be helpful for bones to be automatically added as child of selected bone with x_position(rest) = parent.length