Personally? Disappointed. Not entirely surprised though.
While Eberron is my favourite setting, it is rather unusual with its views on alignment, race, magic etc and so rather "niche". I suppose that its only logical that they try to capitalise on the larger fanbases of Forgotten Realms and other more "generic fantasy" settings that more people will be comfortable with.
There is a vast amount more content available in Eberron should they decide to use it. Xen'drik is a mostly unexplored frontier land, but there are several other continents, and many other nations and power groups with potential plot.
Unlike in some of the other settings (not just FR) where any yahoo with a planar travel spell can turn up and start poking their god.