Why not have both? A language which supports strong visualization of its underlying code would be a win for developers.

The point of visualization is to improve understanding where text fails.

Such a language would likely have more constraints, but constraints are not necessarily a bad thing.

DRAKON-Erlang looks like such an environment.

https://www.youtube.com/watch?v=yZLedcnFA94 http://drakon-editor.sourceforge.net/

I hope the future of software development will include powerful visualization tools and A.I. to help developers deal with ever increasing complexity.