Gomez said:
I bought Gamma World d20 sight unseen because I am a FAN of the older versions. . . . When it did not live up to my expectations then I have a right to not like it.
Well said.
In an earlier post, I mentioned "canon." I don't want to put words in your mouth but I think that is what you are talking about. There is a GW canon and you anticipated that any product with a GW title would adhere, more or less, to that canon, absent perhaps some reason to deviate from it. When what you purchased deviated from your canon expectations without sufficient explanation or substitution, you were disappointed. Please forgive me if I am misreading you.
If the canon of Setting X says the sky is blue and writer declares the sky orange, without explanation, both the product and writer may be legitimately criticized by fans of Setting X, who expected the sky to be blue (ie the party assenting to the unexplained deviation from canon).
Arguably, the purchaser could have discovered the deviation and not purchased the product but that is not the only legitimate option. Feedback is fundamentally legitimate. And fans follow their favorite setting, through good and bad times. I have heard this referred to as "The BOS Factor." BOS = Buy On Sight. I would argue that it is this very devotion that animates the hobby and that the hobby would be poorer if fewer gamers did not feel so strongly about their favorite settings or products.
So what to do when you BOS a product and it turns out that it deviates from canon without explaination? You complain! And you don't have to hide your head when you do so! And you do not have to be made to feel silly because you didn't look first, or having looked, still BOSed because you are a fan of the setting.
I imagine every game publisher would kill to produce nothing but material judged to be BOS products by consumers; TSR used to call them "must haves." It is disingenuous to imagine otherwise as publishers are in the business of selling product and BOS products have a guaranteed sales base.