Sorry buddy, but that's just your perception on this. At no point is a new visual skin for your character "Content". About the only content they produce for the new races are the very small chains for your armor. To say that this is content, is hilarious. Furthermore, what would you consider .... Death Knights? Demon Hunters? Pandarens. Cash grabs? YOU WANT TO BE ONE OF THESE? PAY FULL PRICE OR BOOST.
Those are worse cash grabs, because they DONT discount them. In this case, they are releasing something probably later than anyone expected since KT's were done, and in doing so they are providing a slight decrease in cost.
I think if I were to actually criticize anything related to this, I would criticize the CURRENT PRICING for all of their value services. They are all too expensive. There should be no reason why a faction change costs $30 USD, and Warcraft 3 Remastered also costs $30. And this isn't because WC3R is underpriced, it's because the value services are EXTREMELY overpriced.
We are quickly reaching the point that server doesnt matter, and the Race change is the only service that actually should cost 20-30. Everything else should be a $5-10 cost, max. Character Customizations should be $5 max, and it will mostly be used to change gender. Race change should be 7-10 max, and PCT's shouldn't even really exist. Faction change should be $20 max and bundled pricing to convert all characters on a realm for a flat fee of like 60.
That is the real travesty here. Not a sale to help new "content" (READ: PLAYERS SKINS) be easier to do, financially.