Definitely agree on sorting out different ammo types - I was never entirely convinced by the "one ammo fits all" idea. However, I reckon you should attempt to make it such that certain gun types can share ammo. This way we always have the option to reverting to a "one ammo fits all" approach if wanted on a given game module...
Different fire actions - in principle, I like the idea. However, if we do this, I reckon it needs to be tied to the weapon (singular) currently held. i.e. a given weapon might be able to fire bullets and launch grenades. Obviously that makes things more complicated than simply assigning two separate weapons to each button.
I also still like the idea of restricting how many weapons you can carry. Maybe we do this through the weight in the inventory system - make most weapons dead heavy, and keys dead light (0 weight). This will set up some neat scenarios in game too, as you could have a section where you need to move a heavy object from one room to another, forcing you to drop all bar one weapon...
Different fire actions - in principle, I like the idea. However, if we do this, I reckon it needs to be tied to the weapon (singular) currently held. i.e. a given weapon might be able to fire bullets and launch grenades. Obviously that makes things more complicated than simply assigning two separate weapons to each button.
I also still like the idea of restricting how many weapons you can carry. Maybe we do this through the weight in the inventory system - make most weapons dead heavy, and keys dead light (0 weight). This will set up some neat scenarios in game too, as you could have a section where you need to move a heavy object from one room to another, forcing you to drop all bar one weapon...