Let's keep this short and simple. If I said that PvP should reward the best gear for PvP and raiding should reward the best gear for raiding, no one would disagree. Saying anything to the contrary would be completely backwards. And yet in 8.2 the best gear for raiding comes from world content (benthic gear) and the best gear for PvP comes from the new raid (thanks to disgustingly OP trinkets that don't get scaled down in PvP).
This is not about viable gear being obtainable from multiple sources. This is about traditional top end sources of gear being completely devalued. Just today I got a 455 TF piece from my weekly chest but it's worse than my benthic piece for the same slot. Am I supposed to be happy about the crazy TF proc? No I'm fucking furious that it's completely worthless for the new raid.
Then you have PvP. What's the point of farming arenas and RBGs for the infinitesimally small chance of getting gear if you get better and more OP gear for far less effort from smashing the new raid on heroic or doing m+? There's none.
Bring back resilience on PvP gear and disable PvE trinkets in arena. This system worked for 6 expansions. There's no reason to change it now. Nuke sockets and effects on benthic gear. Let casuals keep their broken benthic effects in Nazjatar. I don't want to be vendoring 455 piece after 455 piece for the next 6 months because I already have BiS from mindlessly grinding manapearls. This madness has to end.