Crediting a JAL class X business fare to JMB gives 70% while crediting that to AA gives 200%
Wow, that's insane. X fares are still quite expensive and cost more than some of the PY buckets that get 100% credit. That's a big slap in the face to JMB members who fly in business class on those fares.
Overall I think JMB has been hugely devalued over the last several years, and it's one of the reasons I'm a free agent now.