Couple more changes added from Magdalena in twitter. Just trying to keep them all in one spot.
Dark Command is baseline for DKs in 6.0. DPS DKs can taunt again. Minor complaint, but I'm happy about it.
Blood Readiness: Anti-magic Shell, Icebound Fortitude, Dancing Runeblade, Vampiric Blood, Bone Shield, and Outbreak abilities
http://beta.wowdb.com/spells/145958-readiness-bloodFrost Readiness: Army of the Dead, Empower Runeblade, Anti-magic Shell, Icebound Fortitude, Pillar of Frost, and Outbreak (yes it says Army)
http://beta.wowdb.com/spells/145959-readiness-frostUnholy Readiness: Army of the Dead, Anti-magic Shell, Icebound Fortitude, Unholy Frenzy, Summon Gargoyle, and Outbreak (Says Army and Unholy Frenzy. They obviously took these abilities away recently in development.)
http://beta.wowdb.com/spells/145960-readiness-unholyScent of Blood triggers on multistrikes now. (was autoattacks, dodges, parries in 5.x)
Blood Presence grants multistrike chance.
Killing Machine confirmed unchanged, so far.
Reaping still has Icy Touch on it, so that (forgive me father for saying this) clunky mechanic remains unchanged, too.
Anti-Magic Shell absorbs 40% of maximum health (down from 50% in 5.x) and lasts 10 sec (up from 5 sec). Duration may be a datamining artifact as lots of durations are 10s, even when clearly wrong.
Talents
Anti-Magic Zone absorbs 20% damage (was 40% in 5.x) and lasts for 10 sec. Duration is likely a datamining error, lots of spells list duration at 10s even when they were much longer in 5.0. Horn of winter lists duration at 10s, when we know it's an hour in 6.0. But possibly not, as the absorb was dropped by half.
Conversion heal dropped from 3% to 2% per second. Many percentage heals were changed in this way, so I wouldn't get too upset about it. It also looks like the initial 5 runic power cost was removed, so it just costs 5 RP/sec period.