I didn't look specifically into that. In general I'm in favour of a very low bar for linguistic acquisition.
I naturalized into the United States, and I believe the English test consisted of my having to read the following sentence, “George Washington was at some point President of the United States.” That was the language test, and I was able to read it and I passed. I think that sort of model is generally the right one.
I'm generally sympathetic to the idea that citizenship should be on the easier side to acquire, especially with respect to language.