I wish you to add this procedure block to change gamerule.
For example: I wanted to create mod that could disable possibility for creepers to grief from begining survival game. I had some other ideas too. But this is impossible and command don't work without permission.
BTW. If "execute a command" procedure block don't work on survival mode and request permission, then such procedure block seems a totally useless for me. I don't see sense of this procedure since I can just type commands in creative mode and totally don't work in survival mode.
I think that commands triggered by "execute command" procedure block should to work always, regardless of permission of creative/survival mode.