I instantly miss torso leaning (I have a lot of short-armed avatars). This is the one thing I feel that the old VRC IK, despite its faults, got right compared with other VRSNS applications. I do not like the sensation of my hands disconnecting from my avatars'. It "feels" odd, and is immersion-breaking.
Meanwhile I am easily fooled into believing that I am rotating my torso a little despite not actually doing so IRL
Could Torso leaning be an option for the new IK? That or automatic rescaling of arm length.