LFR should be just training dummy, where I would be able to test my DPS/HPS, that would have been changed due to obtaining new items on a previous run - nothing more. But making it more like WotLK 5ppls/raids - is actually good idea. WotLK 5ppls/raids weren't hard, but they still had 1-2 mechanics, that should have been followed. And that "I'm doing everything right" feeling granted enough satisfaction to make them enjoyable.