Realizing the PTR has not released yet (dec 2nd) to test out the new expertise system, so this post may be too soon.
I enjoy the expertise systems goal to have more end game content utilized with the different gypsum drops but I failed to see any love go towards gathering/refining. This feels like an easy add on for the lv 175 gathering nodes’ drop table or even simpler by adding expertise to the gathering skill post lv200. I love seeing crafters can increase expertise to continue end game progression after lv 200 but what about refiners?
I think deep down people want to keep earning xp or progression after lv 200 and adding gypsum to these skills would add another way to progress the end game in the way you want to.