Well the new Dante book was a bit disappointing. They took away his no scatter DS and hit and run. They did lower his points cost, but it kind of robs the idea of the most talented strategist in the imperium when you take away his tactical flexibility. I mean, he's got an initiative of six but he will always strike last because of the axe, and he can't hit and run anymore so the high initiative really has no point at all anymore. As a lifetime Blood Angel player, and a big fan of Dante, I'm a bit sad about the changes. I'd rather pay more points and have the flexibility :/
On a side note, for the points he costs now, he's quite a bargain. A BA captain with a jump pack, power weapon, and infernus pistol costs 155. Dante is now 165, but has the 2+ armor save, higher stat line (in general), and still has the Death Mask of Sanguinius. It's certainly cost effective but still not my favorite way to play him.
So far as the fluff goes, they kind of went a bit dark with his story. They emphasized this new idea of his "accidental success" and a kind of made his rise to power an exercise in the old spanish inquisition gag. It just didn't fit the spirit of the codex bio's that have been there since 3rd edition and before.
My favorite Dante build was to keep him with some Sanguinary Guard, add a priest, and add a librarian (decked out with prescience and another Div power, and all with Infernus Pistols) and DS behind the biggest tank/monster around and kill it in one round. Expensive, but effective
That's all going to change now. I'll likely still run him so I can have SG as troops and all that, but that's going to force me to make some serious changes to how I field him.
I just hope that they don't ruin Mephiston