I don't understand the consistent malcontent. I played about with it for a hour to get a gist of the DLC ready to gain some knowledge for the impending survival and this is $10 worth of content. The amount of things I can think of that are $10 (~£7) that don't nearly last as long or are as good.
Yes, back in the day a lot of stuff was included in free patches which you got on a PC magazine. But there were expansions too (Baldur's Gate 1999, TOTSC, for example.). The simple fact of the matter, back then, the gaming industry was still growing and didn't have the power to ask for, what is really; just amounts. And now, with over 3,000,000,000 hours put into gaming per week the industry has grown and, in terms of entertainment and leisure it's the deserved giant that it is.
Back to the specifics. This is a company that makes good products. I gave them my money because I wish to see them sustain themselves and continue in their product development. I also work in this industry and I would be a total hypocrite if I didn't pump some funds into it. How could I expect anyone to pay for my games when I wont pay for theirs?