Eberron's pantheons themselves are, IMO, quite boring. They're just standard pantheon gods. The main thing special about them is that they may or may not exist. Oh, and the fact that they're actually worshipped similarly how polytheistic religions in the real world were/are, unlike the strange mishmash of polytheism and monotheism that D&D religions typically follow.
The thing that makes this great is the consequences of not knowing if the gods exist. It allows for a lot more nuanced and interesting religions. Most D&D religions tend to be a bit boring and homogenous, because the gods normally objectively exist and can answer your questions, while Eberron not confirming their existence allows for The Blood of Vol, the Path of Light, the Church of the Silver Flame, the Becoming God, and its other great religions to exist without being the "weirdos" of the setting. In fact, they're kind of the opposite of the "weirdos" in Eberron, because there's no evidence for the gods existing, but the Silver Flame does exist and worshipping it does influence the world and your afterlife. The Blood of Vol has some genuinely great points about how if the gods do exist, they're probably jerks, and you should try to perfect yourself instead of caring about some irrelevant ultimate beings. The Becoming God is a Warforged religion that worships an unborn god that they believe will be born (and you can get cleric powers from worshipping a god that objectively doesn't exist), there's even a faction of the religion that worships the Lord of Blades and is trying to turn him into a god.
Most other D&D settings don't do anything even close to as interesting and nuanced as that. The closest thing to this from a setting that does objectively have gods is the Dawn War Pantheon (which I do like about as much as I like Eberron's take on religion).
The "statement" that Eberron makes is that D&D's standard take on religion is often bad and boring, and the game is actually better without it. It proves this by subverting the standard D&D assumptions about deities and making its most interesting religions be the ones completely unconnected to its main pantheons.