You’re not looking at the rewards correctly; yes, stamina packs have been cut. But look at the specific gear items offered as rewards (especially the level 14-16 rewards)—those specific levels are composite gears which require up to 400 scraps apiece. So rather than receiving four 50-scrap items (which in L14-16 were O+8 to C+1 iirc), you are receiving four items w/5-8x as many scraps needed. Even if you back out the scroll scraps that we all have coming out of our ears from challenges, that’s still up to 6 individual 50 scrap items each gear you don’t have to farm.
Assuming you use an NDD & farm those scraps on a 75% drop location (which may not always be available depending on which scrap we’re talking about, but roll with me here for a moment) it would take ~4 stam packs to harvest those 50 scraps. Each of those gears contains up to six of those items, so each composite gear is the equivalent of ~24 stam packs. Back out the four single scrap gears you were getting before as opportunity cost and the level 16 rewards alone is a net 80 stam pack gain to the players. The total loss of stam pack items you’ve mentioned is 30.
In other words, these rewards aren’t nerfed. They’re a cornucopia.