I've been thinking about why I can't bring myself to replay this part of the saga. And it's really quite simple. "Champions" for me combines unappealing gameplay with unappealing rewards. This is a deadly combination. I'll play appealing content with unappealing rewards. I'll spend some time playing unappealing content for appealing rewards, until I get those rewards. I'll fawn over appealing content with appealing rewards and play it for a long time. Who doesn't?
Now, these are subjective terms. My "appealing" can be someone else's "unappealing", we all have different preferences. (I'm using these 2 terms because they're the most neutral ones I can think of. The least loaded terms, so as to not predispose people through use of language.)
Now, I'm wondering how other people see these two aspects of the saga (gameplay and rewards).