[joshuak]

I notice that the bug was in the user's failure to communicate the intent of the scalar. Presumably with regular use users would learn to be more clear and/or anticipate the likely fixes to ambiguous labels.

Also, since it would be used to build tests as well, I'd expect such misunderstandings to be pretty obvious. I would be willing to bet you'd see a net reduction in bugs, and a substantial reduction in typo related bugs.

But if you mean by lowered barrier of entry you mean the population of programmers would be less competent, yes bugs in the design might increase, however being able to more quickly get to the point of evaluating a design is a great way to learn better design.