When editing a T-splien it should be possible to set the pivot point for example to the origin point, even when the for one is trying to edit is off-center. Fusion 360's "Edit Form interface does not provide this ability that is present in other parts of Fusion 360.
This animated gif shows what this could be useful for. This was done in Blender with proportional editing. The same should be possible in Fusion 360 with Soft Modification: