I think they took it out to stop people from using the new marks for mats system as a rep loop. I'll try to explain: at a certain point, what do I need marks for? But I can always use rep. So I could've, in theory, shelled out a bunch of marks to buy mats, then turned those mats in for rep. You lose out in the end, of course, but players would still do it. Add that to the fact that they added mats as the rewards for the daily heroic and patrol bounties, and you would've had [b]a lot[/b] more people using mats to rep up. I'm sorry that you're missing out. I only did the mat exchange a couple of times, so it doesn't affect me that much. I hated losing time farming, so I'm happy with the change, but I can understand why yer bummed.