I have played through most of DL with 2 friends. I am generally the better player and tend to out level them both over time. We used the disaster relief packages to equalize our survival levels originally (all going up to the next survival level at the same time) with them using more packages than I did. Then we did the same with Legend Levels.
As of this patch, I can no longer give them my disaster relief packages. They had been using theirs until they ran out and then were going to use mine (I haven't used many). I have 43 packages saved up and suddenly today I can't give them to my friends. If I use them I will get 6 or 7 levels more ahead of them than I already am.
We can still trade weapons, but when I drop a relief package on the ground They can not pick it up. Is this intentional? If so it's really lame. there really isn't a reason to stop the swap of relief packages among friends.