There's no reason to jump to that conclusion. We don't make ranking changes to improve adsense revenue, and don't use it as a metric to evaluate ranking algorithms. We don't even have a mechanism to collect the data.
I realize you can't guarantee any results, but honestly, we really have absolutely no clue what to do next. Every change we've made to our site in the past 2 years has been to try to do everything we read that Google wants from official Google channels. We truly just don't know what else to do.
Edit to add: we did 3 months ago change from a very long domain name to a short one (faso.com) because it is shorter and we own a federal trademark on the word "FASO" and thought that Google wanted to place more emphasis on brands - our rankings stayed the same and even improved....until Monday.