It actually shouldn't happen, spawning behind back as right when an enemy is to be placed, the game checks if the room is visible or not. I will be modifying spawning again as I want to have more directed experience. Currently it is a bit wave based but really random.
As for fists, pressing grip and putting thumb on the controller should be enough to make a fist.
I want to avoid situations in which same controls do different things. And have it as simple as it is. Holding grip is also used to grab objects and makes the whole thing context dependent. It is impossible to avoid such situations but having as little as possible should help. Although I wonder if grip only deploy/holster could work better with fast reload EXM. Worth trying out.