Does kennen R still hit akali in her shroud?

Kennen R is an AoE Ability that hits everything within the circle and Akalis shroud does not protect her from any AoE Spells that are hitting her, so yes. Kennen R will still hit her while she is in shroud, as will every other AoE Effect.

i do have to say riot did a VERY good job with shroud interactions

she cant drop ulti

can still pounce to her. (although since takedown is an auto you are unable to hit her with that as long as she stays untargetable.

i was very worryed when she came out she would completely break certain interactions

im still slightly that as a champion who used to softcounter because of true sight, she now softcounters me became even though i can reveal her i can actaully KILL her becuase my damage move of takedown is an auto.

but it ended up bring a lot better than i expected. i would be surprised if they didn't do the same thing with kennen to make it work

i honestly have no idea. never tried Kennen before.

i hope since it's an aoe ability

This is tricky, since Kennen's R is technically a "targetted AOE" (it applies a targetted hit effect in an AOE around kennen).