Removing extensions used by 55 million users is weighed against the loss of functionality provided by those extensions. Maybe Google just doesn’t want to piss off 55 million users (actually a lot more since, as you say, your list of compromised extensions is not complete)
Yes, much better to let 55 million users blame the browser for redirecting search queries, excessive ads, erratic behavior and data leaks. :-)
Funny thing is: I can imagine Google being fine with everything on this list but the first point. When it comes to hijacking search, Google is absolutely no fun.
