I personally think that a need/greed system would satisfy the biggest need for trading, and that is me getting 10 VoC and others getting none. This would allow people to get the guns they desire, but making sure they actually deserve it. This would eliminate people trading fully maxed out gear to new friends and have them miss out on the experience and not have someone who's never done the hard VoG with the vex. If you don't understand what this system entails I'll explain. We beat Templar, instead of awarding loot right away it pops up a screen showing all loot (aside from ascendant material bc everyone gets that). Each person will then select need/greed on each item. Needs will rank higher than greeds and then it's up to rng to determine who wins between the same level of neediness. This way in groups of friends we can help eachother out by letting eachother get what we need by all greeding besides the one person. TLDR- implement need/greed rolls instead of trading