Unless something that is written is offensive then it's best to just let the edit stand. The owner of the page can change things again later. Since this page is up for adoption unless you're going to adopt it you should just leave it since whoever adopts it might change it anyways. Try just leaving a note on the talkpage next time.
And I'm pretty sure when they said that Berry was trying to control the Mew team they meant that Berry was trying make herself the absolute leader again.