Couple of questions:
(1) Yes, the "gulper mouth" part isn't a suicide clip, but is the back end that you depress? Can line get caught there? I think that's the concern.
(2) So you use the gulper clip to permanently stow the light. Can it be used to temporarily stow the light somehow (i.e. so it hangs pointing light down)?
(3) If you're going to add means to the goodman handle to attach a bolt snap on the side, I know many would prefer the option to be on the right (diver's thumb side), not the left as you have it now. That gives you the option of using your thumb to hold the clip in when working around line.