Wanted to comment on cleaving strikes.
The community is clearly against it. I also think it is an outdated mechanic. If you look at pretty much all melee dps, all of them have an aoe ability they can spend with a short CD. I think that is the root cause of frustration for dk aoe.
What aoe spender do we have? Unholy has aoe RP with epidemic, frost has (imo a very underwhelming) aoe rp spender with glacial advance. But we don’t have a rune spender, which then causes us to have cleaving strikes required. This issue is even greater for frost due to all the power behind obliterate.
Warriors have whirlwind or cleave. Both on short cds. Paladins have divine storm, DH have blade dance, rogues have aoe combo point spenders as well (unless outlaw, which is just aoe regardless). I could go on, but I think you get the point.
The other issue, is the fact we have more power tied into the way DKs cleave. We are using single target abilities to hit multiple enemies. For Unholy, this provides mass aoe with exploding wounds, while for frost it causes insane cleave with obliteration. (Frost specifically already has too much power into obliterate in general). On top of this, we also have dnd causing other buffs like extra haste. No one likes cleaving strikes. Even with the 4 sec buff it still feels bad to play and causing too many issues (looking at your obliterate builds)
Can we please just have dedicated aoe spenders that costs runes? This would allow for better tuning overall for all the specs.
Even blood imo should have a new rune spender for aoe. But maybe that is just by opinion.
In cleaving strikes place, you could instead have a choice node with defile, or maybe (Heartstrike, Scourge Strike, Obliterate) automatically proc dnd at the targets location with a cd baked in.
Then add the RUNE spending aoe abilities that I am sure can easily be cooked up and you’re set.
For blood specifically, if they don’t want to make a new aoe rune spender, just make cleaving strikes baseline for blood.