I don't have time to address every point that's been raised in conjunction with me, but I'll touch on a few.
1. I do like 4E. I think it's a good match for Eberron in a number of ways. The integration of action points into the core rules is one example of this. The fact that PCs and NPCs are handled in different ways ties to the "PCs are special" aspect of Eberron. Personally, I've found that skill challenges help when developing a campaign that is heavily based on espionage or intrigue. However, I don't think I've ever said that 4E is "ideal". I like it. I'm enjoying playing it. I think it's a good match for Eberron. But I also like Over The Edge, Hero System, Dogs In The Vineyard, and many many other games. And I've run Eberron using Over The Edge rules in the past. The best system depends n what you're looking for. I know people who prefer to stick with 3.5 for Eberron, and I know people who've converted it to Savage Worlds. At the moment, when I play D&D, I'm playing 4E, not 3.5 - but that doesn't mean I think 3E is garbage and 4E is the One True System.
2. Touching on a question that was raised, yes, the noir aspect of things is still there. Personally, I think that a lot of the sources of tension and intrigue in the world didn't get enough attention in the 3E edition, and I've tried to call these out in my sections of the 4E book. Ongoing tension between the Thronehold nations and the fear of the next war: the treaty's only been signed for a few years, and was primarily only signed because of fear of the Mourning, and there's a strong cold war going on. This is something seen in The Queen of Stone, and something I want to make sure people realize for the world at large. There is peace - but the threat of war and the intrigue associated with this threat are major concerns. Likewise you have the ambition of the dragonmarked houses, which can come out in many ways. In general, this is what I feel 4E Eberron has to offer - a closer look at some of the nations, organizations, or subjects that never received much attention the first time around.
3. I think people are overly concerned about the transformation of Eberron's cosmology. What I've said before is that I feel that my novels stand up perfectly well in 4E Eberron - and those novels include important connections to Thelanis, Fernia, and Dal Quor. Xoriat may be Eberron's far realm, but it's still the home of the daelkyr, and still the realm of madness, touching every mortal mind in its own way. Eberron still has its manifest zones, and the power of the planes still waxes and wanes. The orrery model of the planes still exists, because it's a model used to reflect that shifting planar influence. It's simply not the ONLY model.
4. For what it's worth, I am happy with the story we've developed for the Eladrin in Eberron... and no, they aren't just Aereni elves. (Side note: I've said before that thanks to the Undying Court, the Aereni are really more remarkable for their accomplishments in the divine sphere than in the arcane. I'm thus happy to see that the Avenger is an excellent match for elves... makes a great Aereni Deathguard trying to hunt down the last scion of Vol!)
I'm not a WotC marketer. There are a few things in the 4E Eberron books that I would have done differently if they'd been entirely in my hands... just as there are many things I'd have done differently in many 3E Eberron books. I'm not going to go into detail, as I don't have the time and I don't want to criticize designers I respect; we've debated the issues in question, and I understand why these decisions were made. My point is that I'm NOT promising that it's the best thing since platinum pieces, that it will solve all your problems, that it will do your dishes and polish your dice. But on the balance, I'm happy with how it turned out, and there are certain aspects I'm very happy with. You'll need to judge for yourself when you have the chance.
), what they need now is a setting with a rich background and a nice level of detail. I didn't buy the FR setting for 4e because I had read too many reviews that cited it's lack of material & info vs. price point... I'm waiting to see if Eberron will be the same way. 
