Sorry if there already is a PTR discussion thread for Blood but after having a quick look I did not find one. Latest changes are underlined.
Level 56 Talents
1. Bloodworms
Your auto attack critical strikes have a chance to summon a Bloodworm. Bloodworms deal minor damage to your target for 15 sec and then burst, healing you for 5% 15% of your missing health. If you drop below 50% health, your Bloodworms will immediately burst and heal you. Blood Death Knight - Level 56 Talent. Approximately 5 procs per minute.
2. Heartbreaker
Heart Strike generates 3 2 additional Runic Power per target hit. Blood Death Knight - Level 56 Talent.
Level 57 Talents
1. Rapid Decomposition
Your Death and Decay deals damage 50% 15% more often, and while in your Death and Decay you generate 15% more Runic Power 1 Runic Power per sec. Blood Death Knight - Level 57 Talent.
Level 58 Talents
1. Blood Tap
Consume shadowy essence. Generates 1 Rune. Maximum 2 charges. Recharge time reduced by 1 2 sec whenever a Bone Shield charge is consumed. Blood Death Knight - Level 58 Talent. Instant.
Level 60 Talents
1. Tombstone
Consume all Consume up to 5 Bone Shield charges. For each charge consumed, you gain 3 6 Runic Power and absorb damage equal to 3% 6% of your maximum health for 8 sec. Blood Death Knight - Level 60 Talent. Instant. 60 sec cooldown.
2. Mark of Blood
Places a Mark of Blood on an enemy for 25 sec. The enemy's damaging auto attacks will also heal their victim for 2% of 3% of the victim's maximum health. Blood Death Knight - Level 60 Talent. 300 Runic Power. 15 yd range. Instant.
Level 75 Talents
1. Tightening Grasp
Reduces the cooldown on Gorefiend's Grasp by 60 30 sec, and your Death and Decay also reduces the movement speed of enemies within its radius by 70%. Blood Death Knight - Level 75 Talent.
2. March of the Damned
Wraith Walk lasts 50% 100% longer and breaks stun, snare, and root effects when cast. Blood Death Knight - Level 75 Talent.
Level 90 Talents
1. Will of the Necropolis
Damage taken below 35% Health is reduced by 20% 35%. Blood Death Knight - Level 90 Talent.
2. Rune Tap
Consume a Rune to reduce all damage taken by 25% 40% for 3 sec. Blood Death Knight - Level 90 Talent. 1 Runes. Instant. 1.5 sec cooldown.
Level 100 Talents
1. Bonestorm
A whirl of bone and gore batters nearby enemies every 1 sec, dealing [ 115.9% of AP ] Shadow damage every 1 sec, and healing you for 1% 2% of your maximum health every time it deals damage. Lasts 1 sec per 10 Runic Power spent. Blood Death Knight - Level 100 Talent. 100 Runic Power. Instant. 60 sec cooldown.
2. Purgatory
An unholy pact that prevents fatal damage, instead absorbing incoming healing equal to the damage prevented, lasting 3 sec. If any healing absorption remains when this effect expires, you will die. This effect may only occur every 3 4 min. Blood Death Knight - Level 100 Talent.
Other
1. Gorefiend's Grasp
Shadowy tendrils coil around all enemies within 20 yards of a hostile or friendly target, pulling them to the target's location. Death Knight - Blood Spec. 30 yd range. Instant. 3 min cooldown. 2 min cooldown.
2. Marrowrend
Smash the target, dealing (315% of weapon damage) Physical damage and generating 3 charges of Bone Shield. Bone Shield Surrounds you with a barrier of whirling bones, reducing all damage you take by 16% and increasing your Haste by 10%. Each damaging attack melee swing against you consumes a charge. Lasts 30 sec or until all charges are consumed. Death Knight - Blood Spec. 2 Runes. Melee range. Instant.
How does everybody feel about the talent adjustments for Blood in 7.1.5?