Tale of Two Wastelands

Has anyone else noticed that most of the Kill Challenges have been changed from Rank to Recurring with Rank having 3 levels to complete while Recurring is on-going and "infinite". It begs the question "what's the point?" of the challenge if there is no completion end point? Sure, you gain experience while doing the challenge but it also costs the player enormous amounts of in-game resources for no reward. Please revert back to the Rank system for kill challenges so that the player can enjoy some sense of accomplishment and completion.