I think we can reasonably expect the challenge logs to be uncapped to scale up to level 60 in SB, similar to how we went through this expansion with them capped at level 50 values. While the challenge log was a great source of leveling exp in ARR, HW saw it as a minor source source of exp for catching up jobs to the current content. I would be truly surprised if SE thought anyone would actually care about 84k exp from a challenge log when the scaling in SB is probably going to be close to 5 million per level starting at 60-61. That's probably going to be close to the exp value of a single SB fate (after the initial few weeks of SE keeping all the SB fates at nerfed xp values because they want us to level off the MSQ).