Changes in mechanics:
Jab 1 no longer has IASA frames. Meaning Link has to return to neutral stance before he use another move other than second hit of jab.
Dtilt has been changed from a spike to a meteor and no longer spikes opponents hanging from the ledge.
Bombsmash has been removed.
Link can no longer ftilt with a bomb.
Dthrow has less knockback, might combo easier to bair.
Hylian shield now blocks Falco and Fox laser.
Damage changes
Dsmash sweetspot nerfed(18% -> 17%)
Uair strong hit nerfed(16% -> 15%), weak hit buffed (10% -> 13%)
Arrows nerfed, fully charged (13% -> 12%)
Grounded up-b buffed, front hit (12% -> 14%)
Knockback changes (Knockback changes from Blubba's guide. Need to be checked if they are actually new changes or Blubba's guide is outdated)
Utilt might have slightly increased knockback, KO option at 137% instead of 138%
ftilt might have slightly increased knockback, KO option at 136% instead of 148%
usmash might have slightly increased knockback, KO option at 110% instead of 115%
first hit fsmash -> second hit fsmash might have slightly increased knockback, KO option at 103% instead of 110%
tipper fsmash might have slightly increased knockback, KO option at 120% instead of 124%
second hit fsmash might have slightly increased knockback, KO option at 113% instead of 119%
first hit dsmash might have slightly increased knockback, KO option at 109% instead of 112%
second hit dsmash might have slightly increased knockback, KO option at 160% instead of 169%
Dash attack close hit might have slightly decreased knockback, KO option at 123% instead of 111%
uthrow might have slightly increased knockback, KO option at 167% instead of 172%
nair might have slightly increased knockback, KO option at 163% instead of 169%
uair might have slightly increased knockback, KO option at 119% instead of 136%
No information in regards to frame data yet.