So far Kunoichi's combos are clunky her skills won't connect freely. So add more and better skill chains.

Her stealth only goes backwards on skill use making it having a delay before hiding. Let her use stealth instantly no matter where we move our joystick/movepad.

Her Super Armor uptime is high but the damage she deals is bad. Which makes it a bad trade for an assassin, reducing Touch of Death cooldown by 1 second would be effective for Kunoichi's overall combo damage.

Remove cooldown reduction enhancement from Rain of Steel to reduce her Super Armor uptime. And add a flow "Flash Slash from PC" a skill that blinks Kunoichi forward with a short distance that deals AoE damage and knock-up on hit to improve her catch ability. Knock up cc is preferrable for the skill so that Kunoichi can still have a room for combo. 

Kunai Throw is basically one of Kunoichi's downside, the skill's DPS is very low and has no cc. Adding a flow that turns it into a mobiilty skill would help her, specifically "Danse Macabre from PC" a skill that makes Kunoichi jump forward and deal bound on hit with good damage but high cooldown.