I'm getting pretty excited about the new GHB. For a long time I've shied away from the armies and units that seemed in limbo between the purely compendium armies like Tombkings and newly released Armies like Stormcast even newly updated armies like Sylvaneth or Ironjaws(thought some of the updated armies did fall behind). Now I'm not terribly worried about building a Disspossed army and that makes me really happy as had almost pull the trigger on a Dwarf Army at the end of 8th edition, but held off with rumors of "9th edition" and further held off when it looked like the "leftover" armies might be forgotten. Now I'm not as worried about them getting EOL'd in the near future and I really want a regluar Dwarf army. Don't get me wrong, I like my Kharadron Overlords and steampunk and Dwarfs are always a fun combo, but it'll be nice to get a regular Dwarf army together. I might even cross them over as allies from time to time as allies(I'll probably get the SC! Fyreslayers box as my only FS and run them ally only).
And speaking of allies, it's basically all I've wanted since I first the "battleline if" in the GHB. Of the death stuff, I really like the Nighthaunt stuff, the Spirithosts, Hexwraiths, Cairnwraiths, and Tomb Bashshees are some of my favorite models in the game(sorry Black Coach, I hate your model and will never buy you), but it was a very thin army to build out to a full 1000 points, much less 2000 and I'd end up having to plan to bring zombies or skeletons for my battlelines and I'd basically end up with generic death with a few Nighthaunt allies rather than the other way around. So now I'll definitely be building my Nighthaught warband(I didn't have any reason to pull the trigger on buying any until Skirmish came along) into a full army. I'm hoping that one of the Mortis Engine keywords are on the Nighhaunt allies list, because right now it's a worst buy Start Collecting box(but the new Nighthaught mini box is pretty sweet).
The initial release of AOS was Chaos controlling most of the realms and everything was just a mess. The first GHB was Sigmar's big push into the realms to push Chaos back and start making things right. And now with this new book it feels like civilizations are getting established again and starting to thrive and now we're getting see what they're like.