Stun is one of the forms of CC which for Legion have taken the forefront power wise .. Stun 'tunneling' is the thing of Legion PvP and I hate it .. It is almost as bad as dying inside a triple fear back when that was a thing.
Its clear Act-Blizz decided stuns should be the theme of Legion just not sure why seeing how EVERYONE wants less CC .. Blizz reduced CC on one hand and increased stun on the other ..