The album art bit I'll generally agree with, but for the activity bit... not to sound too harsh, but did you even try to find it after they did a minor redesign a while back?
Menu ("..." on left in web) > Browse stations > Activities
The change occurred ages ago so I might be forgetting details, but what I think was removed was a more curated way of matching stations with the activity, with descriptions for each. Now it is just a ton of radio stations that often seem unrelated, and no upfront description of what it is unless you click through. Just more giant thumbnails I don't need.
Menu ("..." on left in web) > Browse stations > Activities
It's right there!