Aye! I've come up with a new system for the armoury with the following improvements:

• Blends better with the other interactable chests/containers
• Improved functionality by separating weapon skin selection and weapon type selection in slot
  How it works:
  The same as the other customization containers (tap the circle to select weapon type, tap on the skin to equip it and display it in the circle), but to equip a weapon in one of the 2 slots you have to double tap the circle, not the skin like before (check image for a better understanding). This allows you to select the skins you want to use beforehand and in combat only switch the weapon type (no more having to find the skin you want to use on the spot). Also, the 2 tap system is conceived to avoid cluttering, you can probably find an easier (more straightforward) way to make it work.