Playing against her is the wost thing imaginable: she has so much movement that it is nearly impossible to get early kills in lane, anytime she is in trouble she can just fly away. It is not fun: with all the damage boots to her basic attacks, she can take a few huge hits on you doing % hp. if you are building a tanky bruiser, you have no chance. Some armor pen and se basically does % true damage.
Later in game she is like a health tank without any real health items, just a black cleaver and she's at about 2.6k. I know she is supposed to be a bruiser, but why does she have to be such an explosive force.
The scaling is soo bad and it makes absoultely no sense why she has an ability with 1< ad, when she is an ad champ.
The combination of movement and minion clearing ability gives her no reason to worry about last hits, they all just come to her.
In conclusion i feel as if there was no balance given to this champ which in the end looks like an upgraded Riven,
Im pretty disappointed

Hey folks,
Thanks again for all the feedback. Responses to a few more common comments:
Vi stops moving when she casts Q:
I've tested this multiple times and I don't think it's the case. Could be a perception problem. What does happen is she slows herself while doing a small "twitch" to transition into the new animation. Due to the change in the position of her head during this time it may look like she's stopping, but I'm pretty sure she will continue on her course unhindered (asides from the slow). Mind testing her with this in mind and letting me know if it still feels like she's stopping?

Vi's E's animation is too long and causes her to lose attack speed:
When I first created the E I thought this was the case as well. After testing it, I'm 95% sure it's another perception problem. The weird things about Vi's E attack animation is that it has a cast frame of 4 while her normal attacks have a cast frame of 8. This means that the damage from your E comes out twice as fast as a normal autoattack and then afterwards it seems way longer before your next attack hits. Here's what is actually happening ("!" = hits, "-" = unit of time):

--------!------------!---- <--Normal attack pattern
----!----------------!---- <--Attack pattern with E on the first hit.


So what's happening when you use E is you still get the same # of attacks per second, E's damage just comes out faster so there ends up being a longer amount of time between hits. Is this a good thing? Seems like it's causing her to feel sluggish...

Patch Notes:
Passive:
Reduced shield duration to 3 secs (down from 5)

Q:
Reduced charge time to 1.25 seconds (down from 1.5)
Changed cooldown to 18/15.5/13/10.5/8 (down from 19/16/13/10/7)

W:
Reduced Armor shred to 20% (down from 25%)
Reduced AD scaling to 1% per 30 AD (down from 1% per 25 AD)

E:
Reduced AoE range to 600 (down from 625)

R:
Reverted AD ratio nerf. AD ratio is back to 1.4 (up from 1.35)

In the end W needed to be toned down. The burst was too high and the armor shred made it so you could never fight her.

The changes to Q are the ones that worry me most as they are the ones that will most affect her flow and feel. How does the reduced charge time on the Q feel? Is it allowing you to do more cool stuff? Does it feel less clunky? Can people still dodge the thing (they should be able to)? What about the change to the Q CD? Do you still feel like you have the tools to move around in a fight?

Probably still not perfectly balanced. If she needs more nerfs they will come. Again, the goal is to make it so she isn't one-shotting people while still being able to provide significant amounts of persistent threat throughout a fight. Don't want her to be crazy OP but also don't want to over nerf.

Would you consider removing the percent of maximum health damage on W? In my opinion percent of maximum health and armor shred on one ability feels terrible to fight against, you could adjust her abilities elsewhere.

It has bad interaction with life-steal.

Back when my Dominion Elo was under 1,600 Elo, I used to play a lot of Gangplank (we're talking quite over 100 games where I manually tracked the data).

Once you have lifesteal, the time between auto attacks becomes a critical consideration, because if you're engaged in a longer brawl and don't insta-gib people, then often what will keep you alive and let you kill the enemy rather than die is how often the lifesteal procs come in.

If you deal 1.2k damage every 1 second, with 20% lifesteal, it's often quite worse than 400 damage every 0.4 seconds. Even without lifesteal, so long the enemy can kill you in under 2 seconds it's clear why even though you lose DPS you gain total damage dealt (and this is why building defenses is increasing your damage, just not your DPS) - with lifesteal, it's even more extreme.

But I understand this is beyond the scope of merely Vi.

I still need to test her again after the changes and give feedback, but from my testing thus far, as a duelist, she really likes some lifesteal early game for sustain. I suspect even moreso with the passive nerfs.