Elephant dead?
I know a slew of regular users who have left Window's phone for the exact same reason...Ads. Apparently no one writes a review without actively ignoring this "feature" for some (all?) phones. If it can't be addressed, then any review seems like propaganda from a stock holder.
Should users that have left be impressed by a working calendar and calculator? Come on. Write a review that will get users back, not patch notes written by a shareholder. The active ignorance of common denominators is a large part of why Windows is in the situation they are currently in.