People may be unhappy with this particular DLC offering, but let's get some perspective, shall we. This statement is ludicrous.
It's not just this one DLC, the overall enthusiasm has shifted to a noticeable downward trend since the Dead DLC.
For the first two DLC's, the general attitude was "this isn't everything I was hoping for, but I want to supprt SD"
Then after the loot pack DLC, fewer people expressed that sentiment, and started seriously questioning the value they were receiving, and a few decided to take a wait and see approach to purchasing other DLC's.
At the release of the Dead DLC, despite some early reported bugs, there were still strong defenders of the DLC business model. After more issues were discovered, (such as the AI's inability to play the Dead), the numbers of people supporting DLC's decreased further.
After this last DLC, many of those who still held onto hope have lost faith, and are holding onto their wallets.