Removed: Bullet Time
Removed: Dash (Let's face it, Dash sucks. Most other jobs have passive speed boosts, and I find Dash inefficient)
Shadow Heart: unchanged
Sommersault Kick→Twirling Kick: Now twirls in both directions instead of one, master level decreased from 20 to 10, range increased from 110% in one direction to 200% in both.
(lolroundhouse)
Double Shot: Master level decreased from 20 to 10, now hits 4 monsters instead of 1, damage reduced from 165% to 140%.
(Hey, it's a mob skill now, would be pretty OP if it was still single target)
Octopush: Passively increases jump by 10 at max level.
New Skill: Pirate Mastery: Becoming the best swashbuckler you can be, increase your accuracy, avoidability, health, and speed.
Level 20: Accuracy: +220, Avoidability: +220, HP: +20%, Speed, +40, Max Speed: +20
(loloriginality)
Moved Skill: Perseverance: Recovers HP and MP over time.
Level 10: Recovers 5% HP/MP every 5 sec
(Let's face it, Corsairs need this. The main reason I quit my corsair is because it had no defensive/survival skill, and their defense was even nerfed in Tempest patch)

Removed: HP Boost (effects moved to Pirate Mastery)
Removed: Tornado Uppercut (because it's weird and out of place)
Removed: Energy Tornado (see above)
Perseverance: moved to 1st job
Knuckle Mastery: unchanged
Knuckle Booster: unchanged
Physical Training: unchanged
Dark Clarity: unchanged
Energy Charge: Seems fine to me, so unchanged
Corkscrew Blow: Master level decreased from 20 to 10, mobs hit increased to 8, , damage increased to 460%, can now be chained to other skills a la Thunder Breaker, and now has invincibility frames again. When in energy mode, turns into Corkscrew Spiral, and deals +20%, with the new effect of rushing monsters.
Returned Skill: Backspin Blow: Allows you to quickly slide backwards and elbow multiple monsters at once, damaging and stunning them.
(Can be chained to other skills like Corkscrew. When in Energy Charge mode: deals +20% damage, and distance moved back increases by 100)
Level 10: MP Cost: 20, Damage: 360%, Max Enemies Hit: 8
(Yeah yeah I know it's the same damage as Corkscrew, I never said this was top notch quality)
Moved Skill: Landlubber Blast→Shockwave: Punches the ground with enough force to create a shockwave that damages multiple enemies.
Level 20: MP Cost: 28, Damage: 440%, Max Enemies Hit: 8, tosses monsters into the air when in Energy Charge mode.
(Other Changes: Delay reduced from 1260 ms to 900 ms, now works properly on lumpy terrain, range increased from 330% in one direction to 400% on both sides with higher vertical range. With active Energy Charge: deals +20% damage, and gains the new effect of tossing monsters into the air, while dealing 50% more damage to mid-air monsters.)

Removed: Stun Mastery (effects moved to Precision Strikes)
Removed: Spiral Assault (moved to Corkscrew Spiral)
Moved: Landlubber Blast
Moved: Energy Shockwave
Moved: Precision Strikes
Super Charge: unchanged
Roll of the Dice: unchanged
Energy Buster→Double Assault: Effects changed to be a punch and a kick, damage reduced from 433% to 400%.
Sonic Buster→Energy Assault: Damage increased from 400% to 433%, stun chance increased from 50% to 70%.
Admiral's Wings: Master level increased from 10 to 15. Now adds 30% Status and Elemental Resistance and 20% HP.
New: Combat Enhancement: Permanently increase your weapon attack, strength, and attack speed.
Level 15: Weapon Attack: 15, STR: +30, Attack Speed: +1
20New: Dragon Strike: Summons a sleeping dragon from the depths of the ground to damage multiple monsters. Passive increases Shockwave's damage.
Level 20: MP Cost: 43, Damage: 415%, Number of Attacks: 2, Max Enemies Hit: 8. Passive Effects: Shockwave Damage: +100%.
(Moved from 4th job. Now has a new effect where it launches you in the air diagonally when used (a la Diagonal Chase), and can be chained with Shockwave, like a reverse Ascension+Thunder. With active Energy Charge, deals +20% extra damage and gains the effect of stunning.)