My take is that Google wanted Vanced dead. On top of trademark problems, if the app was a modified official client then copyright is also at issue. And there's

My take is that Google wanted Vanced dead. On top of trademark problems, if the app was a modified official client then copyright is also at issue. And there's always the CFAA hammer looming. It wouldn't cost much, compared to litigation, for Google to send them a letter outlining these issues. It's possible they made Vanced an offer they couldn't refuse (i.e., shut down now and avoid litigation)