There is a new Schweizer style design that has roller bearings on the slide hook, used towing ultralights, not approved for airplane, no STC that I am aware of.

A Tost release on the tow plane should release a lot easier than the Schweizer style.

One could question the weak link. But a weak link may not fail with a gradual onset of load, but will snap if jerked as in a poor slack line recovery.

BillT