I'm pretty happy with the endgame at this point, and ecstatic about the racing.
Prior to the racing announcement, I had this checklist in my mind formed from activities that are already in the game. New versions of strikes. New public events. Crucible maps. That kind of thing. What the announcement made me realize is how much I'm looking forward to variety. For all the flaws Prison of Elders had, it nestled in nicely with the raids and PvP endgame to offer something the game didn't have yet. I think racing fills a similar void and I hope it became a regular rotating event.