Can we give Jhin the Lucian treatment please?
AKA reduce his passive's duration?
Lucian's passive duration was halved because he could hold it in and pressure the enemy ADD with it for a long time.
Meanwhile, Jhin can hold his 4th shot for 10 seconds before it goes away, which is pretty oppressive early game. Something like 5 seconds would be a lot more balanced.
At least, with a reduced duration, he wouldn't be so oppressive in lane, but he would still be good in extended trades and teamfighting, as he shouldn't stop attacking for so long.