The QSS nerf is a lever for balancing Zed in the future
Zed has to get some strength besides his ult because otherwise, he would have nothing. You buy
and he becomes useless.
Now that
in not a problem for Zed, Riot can find good ways to balance him, probably by nerfing his poke or waveclear.
It's the same for
. It's a balancing lever.
But don't expect these changes soon. Riot still needs to think about what and how he should be nerfed. Yes, he will be OP for a time, but it is a necessary evil for getting the game balanced.
and
who were also countered by QSS in some degree will slip unnoticed and get stronger. Also I wonder what the interaction with Last Breath will be (you can currently QSS it, I don't know if you will be able to)