@Riot Assassin Update Changes for Zed, Ekko, Khazix, and Fizz

Just wanted to know what you are going to do to these particular assassins. I main ekko in mid lane, so I really want to know what changes you are gonna make. Earlier I heard that he would just get number changes, but from the posts Im seeing now it seems he might get more than that. Any gameplay changes I should know about to prep for playing him? I dont play zed, but I do face him too much i blind. Same question goes for him. As for kha and fizz, are you just tweaking 1 ability for each? (Kha's Evolve and Fizz w) and tweaking other numbers?

I'm not so sure to expect this update, because with each class update it seems the smaller class updates change gameplay more and more. In the marksman update, the small marksman changes were minimal, just tweaks to some numbers. In the mage update, they moved on to changing the way some ults work (Annie, Kennen) and new passives (veigar, fiddle). It seems now the changes will be even bigger for this update with the recent posts and what they describe.