How's Ash a skirmisher and not assault -_- ?

Most of her abilities involve rendering your opponents helpless before getting the jump on 'em as quickly as it can be, If that doesnt scream (I AM ASSAULT!) then I honestly dont know what does. Another thing, Ash as I see her is just another version of what revenant used to be, Instead of catching your enemies offguard and depriving them from their abilities. She catches your enemies offguard and takes away their movement and space. And rev wasnt a skirmisher at that time. He was assault. Ash is a skirmisher. Am I missing something here?