Here are my thoughts on the Akali changes so far

Passive: I like the direction that the changes went with her passive. One thing I don't like is that in order to make full use of her passive she needs to get two auto attacks off which can be hard with her clunky auto attack animation. I think speeding up her auto attack animation and making it less clunky would be enough to make getting off both parts of her passive feel more fluid.

In terms of the power of her passive it needs some tuning. The health restore is fine as it is in my opinion but the cooldown and on hit magic damage need some tuning. I feel that it is up too often during early game, but up not often enough during late game. I would suggest changing the cooldown to 11-3 from 8-5 based on level. The on hit magic damage is a little too much early on in the game and it becomes even more oppressive when you get revolver. I think the scaling is fine, but the base damage could probably be changed to something along the lines of 5-65 based on level from 14-70 based on level. Maybe the ratio could be increased a little bit if that makes it too weak, but I don't think it will. Otherwise I think the passive is right where it should be.

Also, change the sound effect for the second part of her passive because it sounds just like her Mota proc which is very misleading.

Twilight Shroud: I think the new effect it has is pretty cool, but it feels really clunky to use. It also takes away a lot of the juking potential she has currently. Right now you can place her shroud wherever you want which allows you to place it in between brushes and on edges of terrain to maximize the amount of walking space you have around your shroud. With this change your only option is to place it on top of yourself and get a blink in exchange for this. I'm very hesitant about this change and I think that it needs some changes or should be pulled completely. I feel like this is a really unnecessary change and makes her shroud feel really weird to use.

I think the shroud duration should stay 8 seconds at all ranks, but in exchange the cooldown is increased at early levels. Instead of lasting 4/5/6/7/8 seconds with a 20 second cooldown at all levels it should be 8 seconds at all ranks with a 24/23/22/21/20 second cooldown (or maybe 26/24.5/23/21.5/20 second cooldown if need be). 4 seconds feels way to short, but keeping it at 8 seconds at all ranks would be a little too much without some sort of nerf considering pinks no longer reveal her.

Crescent Slash: I'm very confused about the changes to her E. I think her E is fine as is and doesn't need any changes. Some context on these changes would be great.

Shadow Dance: The damage nerf is fine considering she gets a lot more damage from her passive now. Considering it's no longer affected by CDR I think changing the cooldown on it from 2 at all ranks to 2/1.75/1.5 wouldn't hurt.

Yeah that's what I think so far. As an Akali main I am definitely very concerned about how her W works because that is one of the funnest parts of her kit and I cannot stress enough how important it is to make it feel fluid with the rest of her kit. If there is one thing I can highlight as most important out of these changes it is definitely her shroud.

Take that as you wish.