IA 13 has some very good stuff in it, and as long as you stay away from ultra comp play, it creates a very fun list to play..
Yeah, I picked up a Relic Sicaran, Fire Raptor, and Hell Blade. I'm also going to build a counts-as-Zarakynel Khornate Warlord on a Carnosaur. The Rapier batteries are also nice. Hopefully one day I'll make some of those, too.
There are lots of cool units, and I guess your stipulation about staying away from ultra-comp play has a lot of merit, but I can't help but be bothered by the obscene point costs and crappy Legacies of Ruin.
Even with all that whining, I love the book. It's just awesome and it feels good to revel in the heresy.
Really, the issue is the codex. It's just so blah. Doesn't mean in its current form it isn't fun or even sometimes competitive. Sorry all, the point wasn't to beat a dead horse. I swear.
I just think it's sorta wishful thinking to assume we're even getting a new book for 7th. I would gladly accept one, but GW really could just call it a day and roll out supplement after supplement since CSM/DA/SM/Tau/Eldar/Daemons already have hardback books. They could get our money by releasing an updated codex that includes new Lords of War and Formations, but couldn't they just as easily release those as supplements or dataslates?