Her cc is subpar compared to other junglers, her sustain damage is subpart compared to other offensive jungler. Her tankiness is average compared to other jungler. Her burst damage require you to land a skillshot to be onpar with other jungler. Her mobility is average. Her clearspeed is average. Her cc is subpar, only worthwhile during laning phase.
She is an average/subpar jungler which relies on skill shots to be viable. She also requires to be build a teamcomp around since she is not naturally very tanky and needs to build alot of damage to have a worthwhile burst.Her lack of hard cc also force other teamates to pick lots of hard cc in her place.
Her tankiness is entirely dependent on her getting right in the enemy's face, which is often incredibly risky; without a reliable way to refresh the shield, she still dies by being breathed on until she gets several very expensive defense/offense items in order to give her some survivability without taking big chunks out of her damage (and tankiness thanks to the shield ratio). Sure, she's far more devastating than Akali, Kass, or Ahri if she gets a good start, but they're all far safer than she could ever hope to be.