I stopped paying them a year ago, before the TR calendar was announced. Originally bought premium for estimated power and the training plans. Then a year ago realized I wasn’t using either, and so it was an easy decision to cancel the subscription. Absolutely nothing to do with TR calendar.
In addition, nothing new at Strava. All the good stuff is from 3rd parties (e.g. Veloviewer). Strava is unresponsive to fixing things like a flat segment along a canal that Strava has listed as a Cat3 climb. What a joke.