I wasn't a fan at all of the new
IG book.
A big nerf to mechanization (that the core rules already pounded into the ground) with costs increases on on several vehicles (and a general nerf on the Chimera), a big nerf to
AA utility (poor Hydra), many major longstanding issues remained unresolved (crappy pricing on heavy weapons units and hellhounds, Heavy still not working quite right on Ordnance Leman Russ tanks) or ineptly handled (Stormtroopers got renamed and reduced in cost but also reduced in capabilities and their core problems of the gun just being too weak and too short ranged remain, Ogryns got some changes but not enough to make them useful, etc).
It did get some kinda cool stuff, don't get me wrong,
IG got some new orders, some cheaper Leman Russ tanks and sentinels, and a new under-costed infantry killer artillery piece along with some psyker options (that promptly became superfluous 6 weeks later) and a new transport (that was unasked for and superfluous right out the gate), but overall I personally wouldn't rank it as a great release.
To top it all off, now we've got an awful sounding new name stuck to this army, and a side-faction book that reads like Harry Potter torture porn (the Militarum Tempestus book).
Also not a fan of the new codex layouts from Orks-onwards.
Personally, my top releases are:
IA13 - I made a thread on this a day or two ago, so for a major overview check that, but this adds a whole lot of stuff to
CSM's and Daemons, and a great Traitor
IG army list. Probably one of the highest value
FW books out there along with
IA12 (which has *two* army lists)
IA12 - a little more than a year old, but I'll include it anyway. Two army lists, one for Necrons with a more melee orientation, and a
DKoK grenadier centered army that I'd been hoping to see forever, as well as some Space Marine additions. Has some of the best art ever put out, and tons of game content.
IA2 rerelease - great book with lots of cool stuff and great art.
Horus Heresy Extermination - boatloads of fluff, awesome art, tons of game content. Even though I don't have any intention of playing an
HH army any time soon, I still love these books. Also, AdMech!
Imperial Knights - there's a lot of controversy over these, and the book obviously is rather thin, but I find with them to be a necessary hardcounter to lots of things which otherwise don't have a reasonable response, plus I do like the models (even if I find their price to be absurd).
Obviously there's a pattern here with me