I havent been number crunching or anything, but yes, Ive been experiencing the same low drop rate. My usual set mission for 6-8 players equivalent , +2-3 mobs and will get the usual (pre i16) salvage and enhancement drop rates. With a huge lack of recipe drops Ive experienced pre-16.
I have 2 accounts logged in and each just 3-4 generic recipes out of the 5-6 runs.
Meh!