I am cautiously optimistic. I always hope for tools, from PF that CCP provides, rather than walls, as it were.
That is, something like 'Casiellaism is a common religion in the Gallente Federation' - this is a tool, or at least a building block. It provides information about something in the game world that I can use if I'd like, or not.
Contrasted with
'Casiellaism is the Gallente religion' - this is more of a wall. It says the Federation has one religion, and this is it. You don't have much wiggle room. I see the most danger from this kind of thing from un-intentionally making the world simpler than it could and perhaps should be (Each empire has it's religion, each empire has it's x races, each empire has it's language (which is not to say there might not be a language that is spoken throughout (but I would hope for room for local dialects. But I drown in parentheses)))
Obviously that is an extreme (and I hope unlikely) example, but it comes down to 'this is a thing in the cluster or in this Empire or what have you', and there being the thing. I think 'the's should be saved for special occasions. It's a pretty big cluster, after all.
All of that being said, a brief encyclopedia of Eve animals would be lovely. A bit of flavor text on a few planets. Average crew and population numbers, for ships and stations (taking into account, one might hope, just how very large they are when you consider them in three dimensions). A ballpark figure for the cluster's population, perhaps.
All of these last few, it is to be hoped, calculated with an eye toward the scale of the thing, the thing being the cluster. In fact, I think that keeping in mind the scale of the cluster is a good idea in general, for the people writing the Eve fiction.
Anyway, I suppose we will see how it goes, and I certainly like the idea of there being an easy bridge into linked-together articles for people to access IG.