That would be nice where my preference is to put the modifier on the set when possible as sets often have more broad range of skills that are supported rather than the supporting legendaries for certain builds. Also, some support legendaries may need rather high buffs.
I think that you are correct in that D3’s age as well as other Diablo/Blizzard’s new projects that the changes going forward will be more modest.
When I checked Blizzard tracker, I think the CM team since early May 2020 has posted ~185 times. That works out to 1 post every 1.5 days.
I am not in the know relative to the barb class experts; however, the CM team has spotlighted experts in other classes. Also, they have sought community input on the key content creators where many are class experts.
The CM is looking for some Diablo content creators - General Discussion - Diablo 3 Forums (blizzard.com)