After mages, the next class update should be Assassins. Here's why
I don't think any other class needs help quite as much as Akali and Talon do. Talon has gotten nothing but nerfs since his release. He is a very volatile champion to buff. And Akali's current meta is a build that is extremely unfun to play against.
I know Aatrox needs help and he's classified as a "Diving Fighter" and is up for a rework in that class as well. But Akali needs changes urgently and Talon needs a healthier, more identifiable kit. If you really have to deal with Aatrox (I honestly think you should) then dedicate a separate pod to him and just turn him into a stand-alone rework, without class associations, while the rest of the team works on the Assassin rework.
In terms of gameplay health, after Mages, I think Assassins need help the most.
-Side note: When you're working on the Assassins, remember that Zed is a great reference. His damaging spells are telegraphed and dodgeable, his mobility is telegraphed, and his kills are always in windows of 3 seconds or longer, allowing a very, very healthy amount of counterplay to skilled opponents. Remember Zed's design when reworking the assassins, as it is a great reference.
. That is how these imbeciles work. Riot is going back to Juggernauts, Tanks, then either Tower Divers or Assassins.