Tbh ..... Irelia is far more broken than Akali atm. Akali's been nerfed and already had ample counterplay in the form of non target aoes.
Irelia..... once she has a Sterak's..... is just stupid. Before then she has counterplay, but the massive AD boost, shield just make encountering her too long and gives her ample time to set up skill reset after skill reset without ever really having to panic. Even if you can hit 4000 damage in a combo, and have 3400 hp...... she can just face tank all that once she has Sterak's.
Intrinsically, her kit being relatively immobile when she doesn't have a target should balance her, but it doesn't.