1. Same with the Ps4 version. I only got Grumio's secret trick bag. When I go to add ons in the main menu there's also Grumio's last/final trick bag but only the other one has a green hook in front of it.

2. Also, same here. I pressed the correct code to deactivate his weapon systems and he even says something along the lines of: "Oh no, I'm useless now!" and then in the next turn blasts my party away. I'm playing honour mode and barely made it out alive by fleeing with the only party member I had left.