I think allowing trading would have a hugely complex and maybe not positive effect on Destiny's economy. I DO think you're using it to address problems that need to be solved, though--the repetitive grind for the sake of loot DOES get old after a while. But that could also be solved by the addition of more content, to be fair. Also, if everyone was getting MORE loot more OFTEN, it wouldn't hurt so much when the engram dropped something you couldn't use--"Oh well, I'll get something next time," you'd say, instead of "Dangit, I spent a week farming the strange coins to buy that and now I just wasted all of that effort!" Upping loot drop rates--even if you still mostly get crap you can't use--would make it feel less like you spent hours doing the same mission over and over with nothing to show for it, a concern that I see cropping up pretty regularly. tl;dr: I think trading would do a lot to fix the grind, but there's other stuff that would help too, like more missions and more loot drops.