Fury is shaping up to be the best PvP spec for warriors in Legion, mostly thanks to its strong self-heals, insane mobility and damage. It fits Fury spec fantasy.

This is the fantasy of an Arms warrior according to Blizzard.

Fantasy of Arms Warriors is to be patient, wait for the enemy to get off-guard, and hit them with a devastating attack. New mastery increases effectiveness of Colossus Smash.
So basically, we wait, build rage and damage modifies, and then smash people in the face. I could fall in love with this gameplay

Colossus Smash+Avatar

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Focused Rage
Focus your rage on your next Mortal Strike, causing it to deal (Attack power * 165 / 100) additional damage. Stacks up to 3 times.
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Sharpen Blade
When activated, your next Mortal Strike will deal 50% increased damage and reduce healing taken by 70% for 4 sec.
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Shattered Defenses
When you apply Colossus Smash to a target, your next Mortal Strike or Execute will have 30% higher critical strike chance and deal 30% additional damage.