Hopefully this is an easy one. Can you enable tones on the keypad so that when you push a button you get audio feedback (like on a telephone)? It’s disconcerting not knowing if you pushed a button correctly. This should include the option to easily enable or disable the tones on a per keypad basis.
Like a keyclick! Sounds good to me. 
This is such a small thing, but it’d be awesome if the keypad made a sound to confirm an entry. Similar to how cell phone and traditional home phones have sound when a button is pressed.