I understand, there's a lot that at first glance looks like is lost by this, but it's clear that they did keep these kind of objections in mind.
The Baker's dozen, for example, is maintained in a couple of ways: Xoriat is no longer considered a part of Eberron's "natural" cosmology, but is instead an unnatural invader - which makes the whole idea of the plane being the embodiment of corruption all the more compelling, since the plane itself is an aberration! So swap Xoriat's moon for Baator.
Second, as I mentioned earlier, the Abyss isn't considered a separate plane so much as the very deepest parts of Khyber. No need for its own moon there.
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Sorry, we were talking about fighting the Archdukes, right?
Yes please! Though it's probably best to fit them into Shavarath rather than incorporating the Nine Hells. If this discussion is any indication, the devs should probably sidestep that particular controversy - DDO isn't exactly known for being a place that's friendly to 4th edition D&D.
I hate how much edition wars create bad blood towards interesting ideas
