I'm pretty sure that the memory/UI retooling necessary will keep most of these features low-tier for a while, BUT for the first two it should be very simple to do. The "Draw Weapon" button already exists, and why it's disabled when not previewing a weapon never made sense to me.

As for the /visor, just switch the "Show/Hide Headgear" button to do three things depending on how many times you click it:

1) Hide Headgear
2) Show Headgear
3) Retract Visor (w/Headgear shown)