as much as I don't like to agree with you I definitely do unfortunately they seem a bit overpowered at the moment, hopefully it can be ironed out before launch thanks for checking the vid out :)
with both abilities that refresh the entire duration of stealth plus heroic and paragon nodes that increase duration of stealth i really don't think this is necessary it's already possible to permastealth basically any solo encounter in the game with enough points into ap regen & stealth duration