No matter which path you pick, Gaffney promises that there will be something meaningful for you to be doing at all times. The important part is that the game has a deliberate balance between path-specific activities and universal ones: "What we do is we take 70% of the world, and that's a mix of all the styles, and then about 30%, depending on the zone, swaps over and that's about you and about your path. So, as an Explorer you have your normal mix of stuff, but then an extra chunk on top of it that's all about exploring."
People from different paths have many ways, reasons, and incentive to interact as they progress through the zones. Gaffney says that WildStar will "pile on the layers" to keep players involved and active. He also assured fans that all paths will have plenty to do in the endgame so that the journey doesn't come to a crashing halt.
[Update: Carbine also released another WildStar Wednesday this afternoon; it features some community discussion all about events in MMOs.]