When 343 unveiled the REQ system, they described how the inspiration for the system came from the fact that the 343 staff has a thing for CCGs and TCGs. They wanted to capture a similar feeling with the REQ system and I think they’ve done a decent job of that so far, except for the fact that there is no trading system in place yet.
Think about it. If you’re playing a CCG/TCG, then you’re probably trading cards at some point. It’s just part of the experience. If 343 wants to full nail that experience, they really ought to add a system where you can trade REQs with others. I think it would do wonders for the community as well by giving it an internal economy among users as well.
Just a thought. Carry on.