Nice idea, I saw similar project in the Unity Market but I didn’t saw, yet, this kind of project on the marketplace of Unreal.
As I’m myself (trying to) develop an RPG I’m looking forward to see more of your work. And it’s nice of you to post the source code of the project (even though some comments may be missing, sorry I’m nit-picking 
)
The video you posted are maybe a little too rough, but it seems to do things correctly 
Good luck