[magot]

But what if a glider, in a new slot, was "given" the AI from a normal aircraft. Could it still be linked to a tow aircraft? Would it then respond to waypoints in the normal manner?

If you use glider as player and switch off autopilot is a normal aircraft.
if use AI glider its not normal aircraft ... glider find only close way to landing ..thats all
we can maybe make mod only for manual detach if is player in glider and autopilot is off ...
but reworking AI will be maybe too much complicated ... this is forgotten work of oleg