Vega hasn't seen any changes at all, from what I can tell.
(B (charge) F+P)
Vega rolls across the ground a few times (the roll can hurt the opponent) then stabs out with his talon.
(D (charge) U+K, then P)
Vega will leap up and jump off the closest wall and then dive at the opponent. You can control the distance Vega travels be holding forward or back, then press any punch button for a swipe.
(D (charge) U+K, direction + P)
Vega leaps up towards the nearest wall and then dives at the opponent. He'll then grab and slam them into the ground. You have to hold any direction before pressing a punch button for him to grab them.
Note: On Vega's stage, Vega will always leap up to the cage in the background when using his claw dive or Izuna drop move.
STRONG & FIERCE PUNCH
Vega backdrops the opponent.
AIR STRONG & FIERCE PUNCH
Vega has an air throw. He can catch jumping opponents and throw them to the ground.
3 HIT COMBO
Jumping forward fierce punch > crouching strong punch > standing strong punch