Classic carrot and stick. Some may see it as a very big stick and a very small carrot, depending on individual circumstances. The 20% discount is not likely to placate those who already have favourable corp rates, and a lot of people have been doubting how widely it will be available, but I'm keeping my fingers crossed. Being selfish, I would have liked to see a few more Diamond-specific enhancements. I was Plat for more than 20 years and know how easy it is to maintain, but to stay Diamond I have to concentrate all of my stays (all leisure and self paid) on Hatt.
I think you will hear the most vocal complaints from those who pay the least, yet demand the most.