First off, the details in my post the other day appears to be all correct about the core units.
Now when you roll for winds of magic, the total number rolled has an additional effect on the army, from all Daemons having to make a instability test (2D6 wounds - Ld) on a double 1 result to creating a new unit of Core Daemons (2D6 +3) on a double 6. Other effects are God specific, and almost always bad for you, ie place small round template on your unit and scatter type damage. A 10 will see you get army wide +1 to ward save. Interestingly enough, the results effect all models, friend or foe.
I can see a lot of players getting upset about this, and at first read sounds like it will slow the game down a little.
Daemonic instabilitiy is similar to what it use to be (2D6-Ld modified by combat result) but now on a roll of double 1 you get all the wounds/models back that where caused that turn in the combat, and on a double 6 you loose the entire unit!
Animosity between Gods is back, with Nurgle hating Tzeentch etc, and along with that you can no longer benefit from inspiring presence and Hold your ground rules unless you are of the same God. Ouch, that will hurt. I have a funny feeling we will see a lot of mono god lists with a sprinkling of chaff from other alignments.
Bloodletters get strength 5 on the charge only, as all Khorne Daemons get +1 strength on a charge, however no sign of hatred anymore (unless you are slannesh, which all khorne daemons hate)
Daemons purchase Daemonic gifts instead of magic items, and have no access to buying items out of the BRB, however they can still get access other ways. There appears to be 3 levels of gifts, Lesser (25), greater (50) and exalted (75 points). Purchasing a gift gives you a D6 roll on a table, with there being options 0-6 (yes 7 in total) for each level. Presumably you will be able to modify this roll (rumours it depends on the character). the 0 result allows you to choose a magic item from the BRB. This could be extremely powerful in a tournament setting if the rumour is correct that you can always opt for option 0.
Several models can purchase loci upgrades in three levels, 25, 50 and 75 again. It appears these will work in the same way daemonic gifts will, and I am guessing they replace magic banners in a way. With it revealed that you can purchase 25 point banners for all the core units, and several special units get 50 point options.... sounds interesting. I would expect the BSB can get access to a 75 pointer, which may have area effect bonuses (depending on alignment). Only the strongest loci takes effect however, so no staking.
Interestingly Fiends are now special, and 65 points a piece with minimum unit size of 3+. Beasts of Nurgle down to 60 points with 1+ unit size. So I guess Beast will replace fiends as the chaff, since Juggers are also 3+.
You can find the leaked army book pictures here at Faeit 212.
All in all some very interesting info out and about now. Some people will be dancing for joy (non Daemon players) where as Daemon players will be doing some worship to Khorne (read rage!). I am going to reserve judgement for now until I read the whole book, however I have one parting shot...
Matt Ward broke fantasy, Daemons should never have a cannon EVER! especially a 135 point move and fire 3+ 5++ T5 W4 one....
Edit: Ive just seen the book and the Magic lores are exactly the same as WoC. Even the nurgle spell that grants a 5+ regen! However, the lore attributes are different, with each successful cast giving the opportunity to create more horrors/daemonettes/plauge bearers etc