Wonder why nobody answered to this. I think the "Mind of the Virtuoso" Trailer created a very different picture of Jihn than his biography or the champion spotlight do, since it only featured the "artist" side (not the brutal, fanatic killer side) of his character.
,
,
and
got shot apperantly, but the characters displayed in the trailer didn't bare any resemblance (Only the symbols that showed up when you clicked their champion icons when their were "dead"). You couldn't really tell that he killed them. There were so many ways to interprete that trailer. The design is also kind of limited by him being an AD Carry. They primarily kill champions. Even if they try to make them perfect.
And for his kit: I think it's fine when it comes to his theme. Set-Up-The-Stage-And-Kill-Your-Enemies-Dramatically-Ult works perfectly. His passive could either prove very strong or go horribly wrong. Unless you play ABSOLUTELY perfect, I think you will lose farm with that.
Yet still I'm absolutely looking forward to this champion (He will be out soon on EUW) and I totally fell in love with his login theme.
And oh boy would I appreciate a new champion from the guy who designed bard. I have never been so hyped for a support character before in this game.
Cheers