The thing about Nekko's passive
Is that it presumes there are champions that people react differently to nowadays, past 25 minutes. You've got vision on someone? Cool, zoom in and murder them. The tankiest of tanks might deter the assassins, but they'll still be engaged on because teams are barely punished for that now.
So how would Nekko win a war of information when the information is meaningless? Pretend to be low health to bait? Jk there's no difference between full health and low health for squishies. Maybe, MAYBE, you make them think a key ally isn't where they're supposed to be on the map (backdoors and such), but making plays that necessarily gives the enemy vision of you, a squishy champ, well unless you have good peel that's just inting.
When people say there's no strategy to this game anymore, I think of all the cheeky things that could be done with Nekko and then realize almost none of them would work in the game's current state. Real bummer, I would've mained her back in the day.