[m12k]

This is remarkably similar to the situation you get with visual scripting in game development - it's intended as a way for designers and artists to do small coding tasks on their own without needing to bother a programmer (e.g. set up a pressure plate that opens a door when you step on it), but their creations also tend to spiral out of control. There's a whole website dedicated to examples of this from Unreal Engine[1]

Personally, I think good refactoring support would be the way to go - make it easier for a programmer to go in and "extract method" or similar to clean things up if they have gotten out of hand, without necessarily having to rewrite the whole thing from scratch.

[1] https://blueprintsfromhell.tumblr.com/