well i as veigar used my e to lock yasuo into place not stunning him, he q'ed me into the air and then ulted me. while he was trapped in my e. Either I dont see it right or there is something wrong. Yasuo's ult dashes him to a target in the air it does not teleport him, or at least it shouldnt, which would allow counter play because at the moment my barrier just means yasuo has got to aim his q and then ult to get out of my only cc and get on top of me
It's intentional that his ult is a blink, not dash.
From 
's League of Legends Wikia page:
Last Breath RANGE: 1200 COOLDOWN: 80 / 55 / 30 Physical Damage: 200 / 300 / 400 (+ 150% bonus AD)
Active: Yasuo blinks to the nearest visible airborne enemy champion to the cursor, instantly generating maximum Flow. Upon arriving, he suspends all nearby airborne enemies for 1 second and deals them physical damage.
For the next 15 seconds, Yasuo ignores 50% of his targets' bonus armor. Casting Last Breath clears all stacks of Gathering Storm.
Sadly he blinks, which is basically a mini 
which is not a dash. Sorry... I play 
often and now I'm afraid of this info...
