I had an idea to fix the complaints that if there was a trading system it would ruin Graal's economy. How about on each trade, there is a small percent of tax added on? It would not take into account how old it is etc, just how much the person paid for it. For example I'm trading my pogo stick(8k) for your 1k rare hat. It would add a 1% tax to the trade, so each player would have to pay 90 (9000*.01) gralats. This way, players would still buy gralat packs so unix and stephan would be happy.
Tl;dr
Taxing trades would fix the economy problem. Now let's get a trade system