I've watched like every Dev Interview/PAX Demo this past weekend, so.. I can't really provide accurate source as to where I remember this from.. But! Thus far, they've only talked about Path's having Active Abilities that you can use in Combat, and that you only have a Single Path Ability Slot on your Bar.. Here's an example that they've ( Carbine ) used; Explorers during WarPlot's could have more scout like abilities, like airstrikes or such so that they could run in there and open things up for the others.