I don't know if she's good, I don't know if she's bad, but Shroud is one of the least fun abilities to deal with in the game. I don't even care about dropping Tower aggro, but being able to nullify anything that isn't a skillshot for such a long duration is so f***ing obnoxious.
Example: Playing Ahri against her. She used her shroud as my charm was about to hit her. My Q was able to hit her, but my W and R couldn't deal any damage to her. That's bull. It feels like she was made for all the whiny assassin mains who got annoyed by champs like Lulu and Alistar having point and click CC. Well, now you can't be clicked on?
Shroud is actually on the same level as Wind Wall when it comes to being unfun to deal with, but the rest of Akali's kit is less annoying than Yasuo's.