Is Vi weak or is Lucian op?
Just had a game where I was Vi with a fed Lucian on the other team. From what I gather, Vi excels at dispatching and picking squishies. This game however, I could do nothing against Lucian 1v1.
I would even catch him off guard with Q out of a bush, AA-E-AA-E-Ult and I would be dead by the time I got him down to 20% hp, started feeling a lil' weak at that point. Granted, he was lvl 18 and I was lvl 16 in this instance. I'd built the following
, while he had Deaths Dance, BOTRK, Essence Reaver and IE.
HALP WHAT MORE CAN I DO

? Well that explains a lot..
with a 3 level advantage there isn't very much in the game that can hope to dual it. You basically have to land your cc and then burst him to death with teammates.