Well Michael's approach isn't bad per se. The problem is that he tests different things tht he mentions.

For example "How does the BKL removal affect performance?" should be "Does the BKL removal influences everyday operations?" and then jump toh the concluion "Not realy" and then maybe a diacussion for a little more depth, being "While doesn't have any real effect on performance, it does make this do that better or faster or worse.".