Jere, thank you so much for the detailed feedback and review!
The bugs you mentioned will be fixed with the next update coming later today :) As far as AP goes, it's affected by the player's ROF (Rate of Fire) stat. The higher the ROF, the more likely you won't spend any AP. This is explained (poorly) in the G.A.T Upgrade screen if you click on ROF. I will try to make things more intuitive in future updates :)
I really love your suggestions and will implement more loot drops with more variety, including outfits and gun parts.
Your feedback will definitely make the game better! I'm so very grateful for your response! I can't thank you enough. Sincerely