Well to being with the Baali have always been enigmatic and contradictory. DAV20 does nothing to change that. It describes their origins in the vague story of the nameless tribe who made sacrifices to demons and other depraved acts until one night a mysterious figure tore into the village, killing them all and tossing their bodies down the sacrificial pit and three crawled out the next night. But it doesn't say who the figure was. In fact it points out that the Tremere will in one breath blame [Tzimisce] and its Clan because of their association with Kupala. In the next they'll blame Saulot, claiming the Salubri's pogrom against the Baali is born out of hidden guilt.
As for the Salubri themselves, all three Castes have their own pages, the Healers, the Warriors and the Watchers*. And they've changed them a bit. It kind of implies that all three Castes got their start in Enoch and further evolved after its fall. But aside from that they largely remain the same. Healers are the faithful humanists, Warriors are the crusaders against evil and the Watchers are one part scholar and one part thief.
*The part of the Clan from the Far East, better known as Wu Zao.
The part in the Appendix I mentioned presents a different scenario following [Tremere]'s devouring of Saulot. Instead of the Castes further dividing, with the Watchers retreating further into the Far East, the Warriors becoming a twisted mockery that we know them as in the modern day and the Healers being virtually wiped out by the Tremere, the Castes come together. They still suffer at the hands of the Tremere and their pogrom but by standing together they endure it. The Warriors even put aside their old hatreds with the Tzimisce in the face of the Tremere.
Fast-forward to the Anarch Revolt and the Convention of Thorns, the Salubri reject the Camarilla because of the Tremere backing it, joining instead with the Tzimisce and Lasombra, creating a different Sabbat. The Black Hand is dominated by the Salubri Warriors, the infernalism that periodically rears its head in the Sabbat finds far less purchase, and the Tal'Mahe'Ra never gets the power influence it had over this Sabbat. Through their influence the Sect is a less monstrous, more philosophical group. Though that is not to say that it isn't the Sword of Caine. They are still hellbent on fighting the Antes, its just that Salubri balance out the excesses of the Tzimisce and Lasombra.
In the end it is this Sabbat, not the Camarilla that becomes the dominant Sect in the world.
Oh and I forgot to mention the surprise Bloodline for those who weren't following the DAV20 development is the Niktuku, what the Nosferatu fear. It is a different albeit interesting take on the Bloodline than what we had previously seen. Certainly it does blur what we knew about them from before but at the same time what it adds does actually add to it, namely their weakness. They don't have the hideousness of the Nosferatu but they have two rather unique flaws. First they only gain for blood point for every three they drain from kine. Second every hundred years they lose one dot in Appearance, transferring it to any Physical Attribute that can handle it, which is especially important because they go out of their way to Embrace young, beautiful people.