just got changed, so there isn't any reason for him to change. He scales better now then he did before imo, though it is harder to do. Just because he isn't easy mode for you anymore doesn't mean he needs to be changed.
could possibly need one. He is in a tough spot I feel because if you buff him too much, people will just take him top/mid lane like they did after his previous "buff/rework", but if he gets nerfed, he just returns to where he is now.
is fine imo. His only "flaw" if you can call it that is that his ultimate has an extremely long CD and it can be stopped easily. Besides that he does very well against certain match ups.
was nerfed because of how much power she exerted before. I really don't know how you would want her reworked. She had her invisi removed because it was too strong and taxing for enemy teams to play against. Yes, it was somewhat fun to play, but considering you are getting ahead because you have an unfair advantage isn't very fun for your opponents, only for you.
probably could use some buffs or changes, but he got "buffed/reworked" recently, so I don't see it coming in. The problem with him I feel is he needs to be played at an incredibly high level to be able to perform effectively, which is why he isn't being changed/buffed.