You said the solution. STOP PLAYING COURT. The adept drop rates were fine 1st 2 weeks as they normally do they suck people in the shadow nerf drop rates and change the drop weighting for perks. This is to extend play time and then they can show their "engagement" metrics to Sony and brag people love it.
Why does it take 8 hours for 1 adept?
Why does the 1 adept drop have the absolute worst perks in the game?
To make you play MORE. They are baiting you with the illusion there is a chance when in reality its a time based thing.
STOP PLAYING NETHER AND COURT. You will see it change overnight and we will get the "we are listening" lies