What was funny about the "review" was that they complained about things like "wasting" pages on Greyhawk. Except they were just using Greyhawk as an example of how to build out a campaign world ... something a brand new DM could find really useful. The pages weren't wasted, they just had a different goal than what their book has. Which that's kind of the thing - these books are targeting different audiences. Make a clear distinction, sell what it is you have to offer, don't call the stuff you don't include because of the divergent goals "filler".