I think there's merit to visual scripting, some people are more comfortable with it than code. The nice thing about Godot's visual language is that it's basically just a visual representation of functions already in GDScript.

Also, with the GDNative thing, you can plug in any programming language you want (it's a C API, and there's already bindings for C++, D, C#, Python, Nim, and it's trivial to add more languages).