I think this book would’ve been a lot better without the addition of the four issues of Fantastic Four. The Inhumans don’t really play that big of a role in that story (which features the birth of Reed and Sue Richards’ daughter Valeria).
The four issues of the Inhumans limited series were much better, especially art-wise, with Lucas and Ladronn’s very European artwork. To me, it was very reminiscent of Jean Giraud or Barry Windsor-Smith. The story was more interesting, but I’m betting your average comic book reader won’t enjoy it, since there’s a lot of text to read and it’s considerably more compressed than most modern story arcs.
The Inhumans is a difficult title to write or even read some days, considering when they’re based around Earth, stories are pretty much limited to Attilan or some interaction with the FF, and anything else is on a grand cosmic scale (which the limited series reprinted here approaches). And with current Marvel continuity thrusting the Inhumans into modern Earth society (in the Inhumanity crossover), thing will probably get more confusing than ever.