Why is it that we can no longer get justice and nation medals from lv10 npcs as we could before the merge?

(If you need these medals they are now in lv9-10 valleys. Lakes, swamps and deserts have been the best for me so far.)

Idk how the drop rates were for those medals before since I didn't farm 10s on S37, but it seems quite low atm. Does anyone else notice a change in drop rates, or have a preference for either medal location?