I'm also in the industry as an artist, level designer and gameplay programmer and have shipped games in Unreal 2, 3 and 4 and Unity, and you'll never convince me that creating boxes and wiring them up will ever be as good as text at expressing game logic and game rules.

I can understand why you might want to use it for shaders. (but not really)

And when it comes to placing volumes and marking up the scene I'll absolutely want visual gizmos.

I genuinely believe that if Epic had taken all the effort they put into blueprints, and put it into a text based programming environment, game designers would be more productive.