I tried all three abilities and they seems to be the same to me....
For anybody who's still curious what's this all about I made this quick illustration:
It's basically the same as the Barbarian's yell: first it's a cone and then you can decide to go for a broad, straight line (think of Iconic Projection or Rolling Flame and such) or a circle around you. Difference only is that the barb yells have an AoE indicator. Why does Clear Out et al. don't have one? I guess because this ability is executed with weapons. And weapons can have their own AoE indicato