Now, I note that in both forms, WSL keeps his arms a bit lower than in the LT forms, and especially in Biu Jee, he maintains a distinctly low elbow position when delivering the rotational punch referenced, but to me (admittedly coming from outside WSL-VT) this still looks like a hook to the body, or at least a VT/WC equivalent! Am I missing something?
Yes. You're looking for imaginary bodies and what these actions could be doing to them, rather than what these actions are doing to our own body.