Nerfing the range of gapcloser isn't entirely the way to go (not completely about Kass)
Even if I've been making a shitton of Kass threads recently, this isn't necessarily about Kass, just in general.
I see suggestions for nerfs to things like Nid or LB or Vi or Jarvan where they propose nerfing the range of LB's W/Nid's W/Vi's Q/Jarvan's EQ, which isn't a good change at all. As much as I hate all four of them, this kind of change just makes a champion feel terrible to play since they're so key to actually dealing damage. For example, while playing Kass recently, I actually missed several kills and even died a few times after calculating a kill because the ult range left me short of them. By nerfing the range of something that is completely key to landing AND that puts them into a shitty position if failed, you are forcing people to essentially relearn a champion and they'll always feel like they have an awkward kit.
This isn't to say that there aren't gapclosers that can have their ranged nerfed, however, such as LB's W return, Zed's W/R swap (doesn't need to be global lol), and point and click things like Jarvan's ult or Lee Sin's W or Vi's ult. Basically, the point is, any gapcloser that needs to land on top of somebody to deal damage just feels terrible to use after having ranged nerfed.
Don't make the same mistake twice even if Nid/LB are cancer tumors to this game.