I like the changes, most of it looks very good and I’m excited that augments will be interesting again. I do hope you change the set augments though, because it looks really expensive and unfriendly to non-hardcore raiders (not to mention to PUG raids...) Maybe it could for stats do something like +2 for the frist, +1 per augment for max +4, or + 10, +5, +5 MRR cap?
Frontloads it for those a bit more casual, and provides the benefit you already planned while also not being NON-functional until you have three raid items...