IMO you're pretty much right BUT I think the reason they took out Mat Exchange was because say I wanted to make a new character, I can just buy lots of mats, transfer it to my new character trade in mats for XP and get to level 20 in a few min. Bungie WANTS us to play their shit campaign over and over again. -...-
English
-
No, that wouldn't work - you only got rep and marks for mats, not XP. And you got only a small amount of those.
-
You did get XP because that's what I did to my characters. Farm mats, then trade them for XP.