How to change Akali.
Completely remove the true stealth from W and make it invisibility instead. Remove the micro-stun from R and allow both parts of R to be used after 1 second instead of waiting 2.5 seconds. Lower the cooldown of R because it is too long for an assassin champion and Akali rarely builds CDR. Lower the energy cost of Q at all ranks because you use Q two times to wave clear and then all your damage is gone while you have to wait for your energy to come back. Make E work like Lee Sin Q (not global) but it deals no damage, it only gives the dash but at a faster speed.
Unless you are ahead, you can barely kill champions fast enough because you have to whittle them down bit by bit, Q + run out of circle then auto attack, then repeat then your energy bar is gone while you sit in W waiting. Sometimes you try to R targets, then you cannot R back and end up dying without killing the targets.
These changes give more counterplay to enemies, but also allow Akali to feel more fun and rewarding to play. Right now Akali mid is at a 45% Win Rate. Akali is just a worser version of Leblanc and other AP assassins. Why bother playing Akali that takes time to kill someone bit by bit, while Leblanc and Kassadin kills targets instantly with ease.