When observing the Character screens or selecting the active weapons from the quick slot during battle, it can be hard to notice which exactly is your currently active weapon. The issue is more apparent if you have two of the same weapons equipped, or two weapons that are really look alike.
To resolve the issue a visual feedback can be added for the Quick slots, to be more easy to see which is your active weapon.
For the the quick slot used in battles, it can be similar to the special abilities, with green color around the active weapon.
For the character sheet it can be again a green circle around the weapon or number of active slot, or by making the active slot number concave.
Attachments, uploaded here:
http://i.imgur.com/WmmF9VU.jpg
http://i.imgur.com/A6JKhIL.jpg