Yes I could also see the potential here for less technical types and hell even the technical types who could be putting their skills to better use over that of constantly having to write up new weapon templates 
So you have my 1+ vote for this plugin, though I would just like to suggest that it would be an interesting improvement if you were to expand this plugin to include basic item archetype creation for items such as pickups, consumables, ammo/attachments, etc.
I would also suggest that you take a look at UE4’s Excel/CVS to CurveTables & DataTabes as a potential way to expand post-creation & export capabilities of your plugin for use by game designers, technical artists, animators, etc. to easily tweak + extend the capabilities of a weapon without needing to jump into the code for a basic tweak of a weapons variables.
DRIVING GAMEPLAY WITH DATA FROM EXCEL: Driving Gameplay with Data from Excel - Unreal Engine