Sure there are engrams galore but mostly green. A few blue and hardly ever purple. Even in the chests it's nothing too super cool that I've gotten. I played Court of Oryx 12 times today and only gotten subpar engrams.
Opened the chest of Yuul and was only a calcified something and a blue engram. Some special 3tier mission popped up where we had to solve what each mission was and only ended up getting 2 strange coin. Did the sky burners pass /key / codes -- still blue engram and calcified blah blah.
How has the Dreadnaught treated you guardian ?
Edit 1: I do about 5 patrols missions and never get a legendary engram. In fact since playing the game since launch I've only gotten 2 legendary engrams from random drops. I've gotten most of my LEs from packages.
Edit 2: most of you didn't know what the calcified fragments did until late last week earlier this week, so stop acting like you knew you were getting something great at the time you got one.