Given the current closures/diversions/alterations, go to Brechfa instead.
Was in Afan a couple of weeks ago. Had a great trip, great trails and great fun, but Brechfa was betterer.
Oh, and if you’re at the top by the park (which is a bit meh, IMHO), be sure to head up the hill and ride the 4X track. That was, simply put, the most fun of the whole trip! We rode it after riding Y Wall and Whites as a loop, and between the first post ride beer and a shower. Super happy fun time! 🙂