The BGS is the foundation upon which many other aspects are layered; there is no such thing as 'creating a more diverse background at the cost of the BGS'.
A lot of the point of the BGS is to be a bit "black box" and require investigation, so it was hard to tell how much was "working as intended" and how much was "a bug".
It was tested about as much as it could have been, I think, under the circumstances.