Here is a quick run down of the big changes that jumped out at me.
Everybody that isn't a tank or speeder has Furious Charge. Oh. Yeah. No more rolling for Red Thirst.
The Baal Strikeforce FOC is 1 HQ, 2 Troop, 1 Elite compulsory and the regular optional choices. Which means you can have 4 Elites in your force. The Command Benefit: Red Thirst, +1 Initiative on the turn any unit charges. Very stabby indeed.
Lord Dante and Master Seth are in the Lord of War slot. Dante got some nice buffs, Eternal Warrior, and his Axe of Heretic Smiting is now +2 Strength, Master Crafted.
Librarian Dread is now a HQ. The Sanguinary Priest is a HQ and a single model with two wounds and Ld 10. Brother Corbulo is a seperate choice. Captain Tycho has two profiles (again), and the Techmarine now a HQ choice. The Reclusiarch is gone, and the 2 wound Chaplain moved to HQ.
Big changes here. Now only two choices! Tactical Squads and Scouts. Tac Squads gained Grav guns and Heavy Flamers as options, but lost Land Raiders as a dedicated transport.
Lots of choices here, good thing you can take 4 in a FOC list. Vanguard Veterans, Death Company and Lemartes, and all the non-psychic Dreadnoughts are now here. And yes, Blood Talons lost their "mulch" stetting and have to settle for x2 Str, Shred.
The Assault Squad is the only addition in Fast. Vanguard and Baal Predator moved out.
The Baal Predator went from Fast to Heavy. Predators, Whirlwinds, and Vindicators can buy overcharged engines. Land Raiders no longer fall from the skies.
Being a (mostly) Codex chapter I was disappointed not to see the Stormtalon gunship, or the Landspeeder Storm as a transport choice for the Scouts. I also miss the Reclusiarch. The rest of the changes make sense to me. I have yet to look deeper at the Psychic stuff, and the of details on some units. That's why there will be a part II.
"So fear not and be proud, for we are the sons of Sanguinius, the protectors of Mankind."
-Commander Lord Dante