8.1 PTR from what I've read so far:
*Percentages are attack power/spellpower scaling
Source
https://www.wowhead.com/class-changes-tides-of-vengeance-patch-81
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Druid - Feral
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*Talents
Sabertooth replaces Predator.
Sabertooth - Ferocious Bite deals 20% increased damage. (Rest involves Rip which is currently irrelevant)
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Hunter - Marksmanship
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Arcane Shot ( 48% to 60% Attack Power )
Aimed Shot - No longer deals 50% increased damage to targets hunter has not damaged.
Steady Shot - also increases the duration of Concussive Shot on the target by 3.0 sec.
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Hunter - Survival
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Kill Command - 7% damage increase -- [Attack Power * 0.6 * (1 + Versatility) *
1.07]
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Mage - Frost
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Blizzard ( 35yd to 40yd )
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Monk - Mistwalker
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Enveloping mist ( 247.5% to 216% Spellpower )
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Monk - Windwalker
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Crackling Jade Lightning (27.977% to 22.4% Attack Power)
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Priest - Discipline
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Power Word: Shield - You cannot shield the target again for 6 sec. -- mana cost increased ( 2.5% to 2.7% )
*Talents
Schism ( 140% to 129% Spellpower )
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Priest - Holy
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Renew ( 20% to 23% Spellpower ) per tick
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Priest - Shadow
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Power Word: Shield - You cannot shield the target again for 6 sec. -- mana cost increased ( 2.5% to 2.7% )
Shadowform - No longer reduces physical damage taken ( from 10% )
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Shaman - Elemental
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Lightning Bolt ( 50.3125% to 70.4% Spellpower )
Flame Shock ( 16 sec to 24 sec ) -- tooltip fix on damage ( 157.5% to 210% Spellpower ) **tick damage unchanged
Earth Shock ( 240% to 210% Spellpower )
Earthbind Totem ( 35yd to 40yd )
*Talents
Earthen Rage replaces Exposed Elements.
Esrthen Rage : Your damaging spells incite the earth around you to come to your aid for 6 sec, repeatedly dealing (13.75% of Spell power) Nature damage to your most recently attacked target.
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Shaman - Enhancement
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Earthbind Totem ( 35yd to 40yd )
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Shaman - Restoration
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Earthbind Totem ( 35yd to 40 yd )
*Talents
Unleashed Life ( 110% to 130% Spellpower ) -- heal increase on next cast ( 45% to 35% ) -- mana cost changed ( 5% to 4% )
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Warlock - Destruction
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Backdraft - now has maximum of 2 charges