Rounser: Not everyone is going to agree with you, please stop stating your opinions as facts.
Everyone defending Eberron: Rounser is never going to agree with you, please stop arguing with him, and get on with talking about Eberron rather than defending it.
For me it is a less generic setting than either FR or GH - I have seen both done to death. I am not saying that they are bad, just that they are what many people expect when reading Generic Fantasy Novel #12 - while not my cuppa tea these days the basic tropes are what I started with many years ago. These settings are easy to create stuff for, the building blocks are all there.
Eberron is not as different from mainstream D&D as some of the settings that came out for 2nd ed., which is both its strength and its weakness. For all its myriad flaws 2nd ed. had some of the coolest settings.
It does try to take a look at how the common magic of a D&D world might shape society - transportation and communication are the two biggest needs for a commercial culture, and since the demand was there someone supplied it. A modern society is rising, old values changing, and the world is becoming a faster paced place.
Like the stories of the 1930s a brutal war is recent history, its conflicts unresolved. People have been displaced, both by the war and by the change in society.
The warforged are both a reminder of the war, and its survivors, heroes, and victims. They find themselves on the outside of the society that created them, blamed by some for the horrors that were unleashed. They have only recently gone from being property, slaves, to being free citizens and subjects, and are as confused as everyone else by the direction the world is taking. How long before they start wondering about philosophy? Mathematics? Physics?
Myself, I like Eberron, I like it that you can no longer go 'it's an orc! Kill it!' and know that you have somehow done a good deed. (I actually started doing that around 1980, nice to see it in an official setting.

) It has the feel of a technological society, while there are still places of mystery, including a lost continent. It is, in a way, 1930s fantasy - Indiana Jones would be at home, as would Sam Spade.
Casablanca is another good place to start, Rick would know the ropes.
The Auld Grump