So, your criticism is that machine-generated code can be hard to edit when a human needs to touch it. I don't see how that is relevant here, being human-legible or editable is not a stated goal of the project. Rather than lobbing criticism against any software which machine-generates code for machine consumption, it makes more sense to use your best judgement and choose the software which is right for your use-case. I don't even want to know why you would ever machine-generate a regexp from a list, not save the list, and then somehow need to edit the regexp without access to the original items. That's not a software problem.