Not-so-bold prediction: Hextech Ultimatum will ultimately lose its movement blocking
Watching EUCS qualifiers at the moment, I cannot help but think that Camille is going the way of Rek'Sai, where she will be pick-or-ban in competitive for an eternity and nerfed in all her abilities for it, ultimately being only picked for the long-range stun of E and her ult's movement blocking.
And ultimately, Riot will have to realize that an ability that works like Hextech Ultimatum is not workable in League.