Sadly, only one has rules for 40k. Plague drones are jet pack cavalry (whoa), LD 7, not fearless but has Daemonic Instability and may deep strike. No Eternal Warrior. More as I can find it.
That's 12+3d6" of movement in a single turn. With three wounds, T5 and S4 poisoned attacks, they appear to be solid harrasment troops, but not super killy without a character. And they do not appear to have Feel No Pain. Daemon of Nurgle means shrouded, which sucks because they're not jetbikes and don't get a jink save to stack on top of it, nor do they have ranged attacks to take advantage of relentless. Nor do they have a high enough initiative to sweep most stuff.
I liken them to Chaos Spawn in terms of their use. Hopefully they are priced similarly.
The more I think about them, the more I figure that they're supposed to scoot across the board darting from area terrain to area terrain to take advantage of shrouded and be annoying. If you can do as much, they're tough as nails to kill. Leave them in the open and they're meat for splinter rifles, demolisher cannons and railguns.
So Beasts are beasts now, and super weird. Very defensively-oriented unit that seems to be there to protect your Plaguebearers from charges. Strange indeed. With 4 wounds and It Will Not Die, they're fairly hardy so long as they don't run afoul of a Vindicator. Not much punchier than they already are, but we don't know what kind of upgrades they can take, if any.
Plague Drones can take upgrades, so may be meaner than they appear. Do not panic.
Daemon Princes are indeed HQs with psychic powers and tons of upgrade options.
Considering there are four heralds in the army list, they appear to still be a 2 for 1 choice.
It does look like he managed to get a lot of stuff into the army at the points total they played, so things may be reasonably priced.
The Flaming Chariot is purported as the best shooting unit in the codex. It's probably Land Speeder fragile, however.
Soul Grinders can take marks which may or may not do the same things as being a Daemon of such and such god. The claw and sword do different things now.
Beasts have Deep Strike, which means that Daemonic Assault is still present in some form or another. The Daemon Prince has a Portalglyph that no doubt has something to do with it.
Khorne Cannons are S8, AP4, 36" large blast. BS5 is odd, but that AP4 thing is a problem. Maybe they can shoot and charge???
Wonder what a Locus and an Exalted Locus does exactly?