The nerfs didn't do much to stop talon and wukong from being good, but they are small steps to try and balance them. Talon needed nerfs compared to zed as the moment he reaches level 2 he can 100 - 0 almost every midlaner in the game and has insane wave clear and roam. He is hard to gank and can shove waves to roam. Zed on the other hand is really weak until his level 3 power spike and even then cannot usually 100-0 you until level 6 unless you get poked out of lane, also mages only need to buy one item to hose his kit cough cough zhonya's hourglass
Talon and Zed are both AD assassins yes, but their playstyles and counter play is vastly different. Zed doesnt have good waveclear early as his q does reduced damage after the first enemy hit and has to use w to trade with you and risk being ganked.
Wukong is still strong because of the CC on his ultimate, and in lane you get free duskblade procs from your stealth in "w?", so the loss of damage is not very significant. I believe this is to control his poke when he is played botlane, which in low elo solo q isnt even played bot.
Fizz did get a w change, but riot stated that his old w was clunky and hard to balance the way it was before. He can still all in you at level 3 and Phreak did the numbers in his patch rundown and shown that if you just auto attack after your combo the damage is relatively the same. He is better at killing people who survived his all in basically.