Akali is how assassins should function.

Compare Akali to Zed.

She needs to land her Q, walk out of a radius to empower her Q, and either walk up to the enemy by using her only defensive (shroud movement speed) or land a skill shot in her E which then has a run time to the target to close distance and trigger her Q. Otherwise the enemy can deny her large damage empowered Q by kiting it out.

In order to trigger electrocute, she must execute her Q>e>run in auto combo, all of which has far more delay than Zed's retarded WEQ.

Akali also has the clear weaknesses of Fizz and Katarina, she can't braindead shove wave in while also having trading power like Zed's shurikens or Talon's Rake.

If she lands her combo, she does a lot of damage, but her combo has clear staggers and landing the damage gives the opponent chance for retaliation since if she lands her E you can walk to tower and force her shroud if she wants to skirmish near tower, which forces her to go without her only form of defense and you can still walk away from the shroud and still be in turret range.

None of this ridiculous WEQ triggering electrocute crap even through minion waves. Her E is bodyblocked by minions so if she wants to trigger electrocute, she must isolate the champion to land her E.

Her ult has clear opportunity costs, it can be used offensively as an execute or as an escape, but not both unlike a Zed who just E+auto+ignite and shadows out after ult.

This is how assassins should function. If you need to give Zed and Talon lane sustain tools to make trading less absurd with them, do so. Implement a healing mechanism akin to Akali with clear opportunity costs. I don't see why Zed and Talon should be the sole outliers among all assassins (perhaps Ekko fits in here too, but he's definitely weaker) where Katarina and Fizz have to wait for their lv6 power spikes to start dominating lane where a Zed and Talon can do so much earlier.