I overall like Eberron's unorthodox nature, but there's some parts I don't like.
Eberron is played up as a pulp/noir setting. It's got quite a bit of the pulp covered, but noir elements don't seem to fit in as well especially in higher-level games.
The characters of noir fiction are ruthless gangsters, jaded detectives, and crooked cops. You can run an adventure around PCs tracking down a depraved serial killer in the grimy alleys of the city of Sharn, but noir tropes don't fit as well into D&D as pulp does. In Pulp, the characters are larger-than-life adventurers, two-fisted explorers, and other "adventuring" archetypes.
By mid-high level the PCs get cool stuff, can afford to live in nice areas of town, and display superhuman levels of skill. A mad scientist Artificer and his Warforged companion are assaulting a crazed baron's airship fortress which laying siege to a city: this idea fits perfectly with Pulp and D&D. A noir game feels more "small-time," limited, and seems inappropriate for higher-level games. It's hard to see a powerful wizard ex-cop as a "down-on-his-luck detective trying to get by."