I find Jihn's design to be extremely... "Eh".
Disclaimer, I'm talking about the character exclusively in his easthetics, idgaf about his kit at the moment.
I won't lie, I was pretty intrigued at the teasers, little reveals and all that, I wanted to know what was the deal with this guy... And then he gets fully revealed and is yet another guy with a gun, so my reaction isn't good or bad, just... "Eh". It's almost as if someone at Riot was watching Phantom of the Opera while cleaning a BB gun, then said "Eureka!" and went to design it. (hue)
Give us something else, damn it, I dunno, there are MANY little corners in LoL's lore which you can further develop instead of giving guns or bows to ADC's. You could have easily gave him somethingsomething a demonic Violin for his same kit, and instead of 4 bullets it could have been a string breaking with each shot, which would be oddly familiar with Sona's Etwahl, and you could develop what's the deal with these killer string instruments.
I dunno, I'm mostly ranting, I guess I can't fall in love with each character's design (for example, mad props on Kindred), so this is mostly just my opinion and sour grapes.