Hi, I'm a new player, only been playing for the last 2 or 3 weeks, I'm EGO barely above 1000...
I did notice since a few days that the drops were kind of "repetitive" to say the least. So I checked the forum and found this thread.
My issue so far is not about orange or not orange, just the variety...
So I wanted to make sure. Last night I decided that, for a few days, I'd record all the drops I'd get.
But after my few hours play session (enough to get 62 keys as drops, then bought 2 more for a purple box) it became clear that even with such a small sample it was enough to showcase the problem.
The screenshot below is from a spreadsheet, and the list of weapons I got from Defiance-Data.
The column named "drops" means what I found on the ground, the column "reward" means what I was awarded during the score sheet at either the end of a Volge Siege, a Coop Instance, Arkfalls with several legs like hellbug-mother, or the lockbox at the end of the play session, and at last the column "vendor" is what I saw as special limited time offer here and there, making sure i'd wait enough between visits, and check various vendors.
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direct link to full size image)
So in white is what I got, but most importantly in red is what i didn't

!
So yeah when I look at the chart above in the assault rifle section i can understand that RNG being RNG and the sample being small I didn't get the last one even if it could have dropped, but then below there are so many weapon categories in which I pulled several times the same unique one and not the others :
well hey, this is where I decided my sample was big enough anyway

!
Again, i'm a new player and used a list without knowing if all those weapons were supposed to be normal drops, but there are indeed names that I recall from 2 weeks ago plus in my inventory some I have kept and am sure I found as drops and not quest rewards and don't see anymore...
EDIT : I played the day after and found an exception. I did 2 Warmasters, and on each I got a couple weapons that are not on the list (splitshot, typhoon, flash and lightning something I believe). They also show as red and not usable because I don't have any DLC yet.