If they are in the GLP category then you are basically forcing teams to stop using GLP except in that one situation near the goal line. No team could risk calling them any other place on the field.
I don't see the problem with them. I doubt they will be overly effective but maybe Charlie can make them work. It would add in a play that the NFL uses often where we have nothing like it. And because this play only has a chance to work near the end zone, I doubt many coaches will use them. It would be foolish to call one on 4th-1 at the 40

Yet, teams who never use GLP could start using the category near the end zone.
Not sure I understand Jerry's objection. I do not see any way for this to be abused.