Adding ARURF right after adding Challenges feels conflicting

With the rotation of ARURF being active this patch, just days after the addition of challenges feels like a slap in the face only for the fact that no challenges are tracked in ARURF. Why release something that doesn't work with the rotating game mode, when players will want to play league to focus on unlocking and progressing their challenges? I want to play ARURF as much as I can, but I also want to grind out titles and challenge progression as well. If it can exist for ARAM, why not ARURF?