Just got the new book in the mailbox, and after an hour of reading and confirming the different leaks on the net I'm tempted to send it right back. In my mind it's terribly badly thought through and here I'll give some examples as to why:
1: A demi company with tons of extra compulsory choices (compared to other demi companies we need to take more compulsory units and have less choices, no HQ swaps etc) that gives no bonus apart from the ones the decurion already does, and you'd never field it without a decurion because the baal strike force gives the same exact bonus...
2: Or maybe the fact that the decurion exclusive bonus is zealot when your 5 man squad is down to 2. And since it only works in round 1 of close combat it won't even work when you take your casualties in said combat. The only use is pretty much if you get unlucky and lose more than half your squad to overwatch. That would still be workable if your auxiliary formations actually benefitted from the bonus but no...
3: The jump assault chapter STILL has overcosted vanguards, but they're still the only sensible option for our second core choice in the decurion. Since you probably want your terminators in another formation (which I'll get to later...) and rocking 5 units of sternguards seems very strange in an assault focused army...
4: The core formations are so bloated that you won't fit more than at most one auxiliary with a bonus into the decurion, and most likely you'll have to settle for one of the fillers if you want to play in the most established points levels for tournaments (1500-2000). If you play 2500+ you can have a field day sure, but that doesn't happen too often does it.
5: The assault from deep strike formations negate both the decurion bonuses and our chapter tactic since neither red thirst nor furious charge works. Unlike other space marines who can deepstrike organised and use their chapter tactics to full effect. The shadowstrike kill team and skyhammer are both vastly superior and would even be more fluffy for BA.
6: The death company decurion has exlusive relics amongst them a cool AP 2 glaive encarmine, but the only ones who can use them are chaplains and death company chaplains who already come with bought and paid for power weapons stock making them ridiculously expensive.
7: Our frag cannons did not get updated to be in line with deathwatch despite the fact that we can only take them for our furioso dreadnoughts.
8: Forcing you not only to take specific HQ choices but to take them with specific kit, pretty much forcing you to buy GWs static new models to field them. The new terminator captain entry is a joke.
I can't see any saving grace apart from the death company formation which actually has augmenting bonuses and is admittedly pretty great. But I want to play my chapter, not an unfluffy whole army of generic black models. The land raider predator formation is good, but good luck fitting that into your less than 2000 point army.
And the rest is just lazy or sub par copy paste from the SM formations and squadrons.
2 steps sideways...
I actually think I could play a better "blood angels" list using the SM codex... There is nothing that we do better apart from the fact that we can have poorly assaulting terminators. And that is not even our fluff unit. That should be a DA formation!
I was pretty upset at the complaining chaos players when their supplement hit, but I rescind all my criticism. I'd rather not have spent my money and put my hopes up for this.
...and that felt good to get out of the system.