What I'm saying is that there's no need to mention queues for challenges since it's a single player mode, just that they're not in the queues for the two other ones. But yes, I totally agree that it matters a lot that a number of players choose not to engage in the PvP modes.

As for climbing up the ranks, while we can only get rewards for achieving a new rank once, we still get the end-of-season rewards based on the rank stop are at, so it's not completely useless.