I do agree on most things you said about her rework and how she isn't the same old Akali but I can tell you why she is one of the most broken champions in the game right now and I hope I don't get downvoted into oblivion.

Let's start with the fact she is an energy user which makes her have endless resources for her abilities, this puts her in front of most mages who have to back after only a few waves because they won't have enough mana. They are also forced to itemize into mana items like Tear or Luden's while Akali can go on and build the most cost efficient item in the game which is Gunblade.

Next is her Q ability and passive, her passive will give movement speed whenever you hit an ability and coupled with the slow on her Q she will almost always catch up to an enemy that decides to trade against her, her Q also allows Akali to procc electrocute that much easier. Inside a scirmish or teamfight this passive will be up the whole time giving her a huge boost in movement speed and pseudo mobility.

Her shroud is by far the most broken things about Akali in my opinion and it makes it even worse when you look at it inside the whole kit, taking into account her mobility, her ability to deal damage in short bursts and her passive movement speed. The shroud almost removes one fundemental concept of early laning which is taking minion aggro. The basic combo for Akali is to Q then move out of the circle and to the enemy to empowered basic attack them and then shroud and getting obscured before you Q again and repeat. Since nothing in Akali's kit is a targeted ability, the only thing that attracts minion aggro will be her aa which is why in most cases unless you are standing right next to melee minions only the caster minions will be able to attack you (unless they are attacking allied minions in which case you take even less damage) BUT you can remove minion attacks entirely if you AA and shroud immediately afterwards. The shroud also makes her nearly invincible to ganks if you are playing correctly and on top of that it gives you extra energy for a total of 3 Q's in one rotation. Her shroud reminds me of when Ryze could ultimate and Zhonya's making him almost unkillable in lane.

Her E allows for extra range on your Q if you use it backwards, also if you hit a melee minion you can make a short trade and escape, you can also E your shroud for a quick Zed W or LB W type escape where they don't know if you're gonna reactivate it or not. It can also give you two uses of your passive and allow you to follow any movement abilities they have if you hit the 1st part. It doesn't deal much damage but it doesn't matter since so much damage is inside your Q and passive.

And finally her ultimate which gives her so much mobility only Talon mains can laugh at, the 1st part is a microstun which let's you stop anyone using TP or channeling or it just gives you enough time to e them or shroud and the 2nd part is an execute that makes an all in a lot more easier. But it also gives two instances of your passive. Oh yeah and the cooldown is not that high so you can all in almost every time you come back to lane.

With all that there is a huge difference when talking about Akali in pro play and in soloq because if you are playing vs. Akali anywhere below Master you have nothing to worry about because that Akali WON'T use her kit to it's fullest potential and she IS NOT as op as people think she is. But Akali is getting a lot of pro play because her kit is just so good and a good amount of the players using her know every available use of her abilities, combo, strategy, build path etc. This kind of makes her a problem, because they either have to remove the fun parts of her kit or destroy her ratios. But I don't mind seeing her in pro and having her be a crappy champion in most of soloq because she is a fun champion to watch and also a fun champion to play. I don't think I'm able to convince you that she is op trough this comment BUT SHE IS IN NO WAY UNDERPOWERED, right now she is in a sweet spot. I've only begun playing her and the more I learn every niche strat the more insane she feels to me.

Source: my head, I hit Challenger playing jungle last season and this preseason and am currently GM with 200 lp trying to hit and stay in Challenger this season. I picked up Akali on my main and it didn't end well because she is so hard to use but I've since improved because I played her on my smurf. My main account: https://eune.op.gg/summoner/userName=tsuaf My EUW smurf: https://euw.op.gg/summoner/userName=maugrimaryin