I've done the math on this a few times. There is extremely little difference in rewards, I think its one piece of additional salvage per 10 million GP until you get to 40 stars. After 40 stars, it is even worse. My guild achieves 43 stars now. We have added nearly 40 million GP since TB first dropped. Our addition of 40 million GP has netted us an extra 2 stars and an additional 2 pieces of salvage. I don't believe rewards will be reworked again anytime soon. I don't think the last rework did enough. It is burning people out.