She has exactly the same problems as old akali. Which really speaks for certainlyt and yes i'm derailing this thread a bit to shit on him deservedly so.
Low interactivity/counterplay and too much sustain.
And you pointed out her problems perfectly. Fuck the true stealth noone cares.
Her being able to harass/trade you without you being able to trade back is one of the biggest problems of old and new akali. Maybe if you play on 5 ping and have a 14 yos reaction time you might be able to get one auto through but other than that there is no chance in hell you trade her back.
Then there is her sustain where you will say "oh but she has to use her Q for it". Yes she has to use an ability that costs nothing to heal back massive amounts of hp she lost in a bad trade. B B B BUT THEN SHE CANT ATTACK YOU, yea but you also cannot force her to attack due to E and W. So simply cannot abuse her supposed counterplay because her kit covers her "weaknesses". Y'know a fact a lot of certainlyt champs (but not only his unfortunately) have in common.
Her stealth duration is just too long. Someone who watches high elo akali play will notice how akali can zone entire teams off for 8 seconds just by throwing down her shroud. It has such ridiculous amounts of power it's insane.
Her kit needs a lot of work before it gets bareable.
Sustain and shroud need massive work.