I upgraded to Chrome 60 and looked at the What's New tab in the Dev Tools and decided to ignore all that BS. Then I actually used the audit tool, powered by Lighthouse, and it is actually very good. Much better than what Pagespeed tells you in my opinion (or GTMetrix which is Pagespeed + YSlow and has been my "go to" tool for years).
Lighthouse does a better job than most tools at finding the really bad bottlenecks. On a page I had previously audited, it found a 172kb image that should be more like 12kb, but which just doesn't float to the top as a recommendation in Pagespeed or similar.