I think this is a great discussion and one we bound to be involved on for some months (if not years). As I mentioned before, I was there for the original game beta, and one think that I remember is that the conversation back then, the promissed being made, expecting for the technology pieces, were not very different. This is to say that the MO was not originally envisioned a pure PvP game. It ended up being one because PVE content was not implemented and the PvP system as really good. Fast forward to MO2, we are again at the stage where the promisses of a comprehensive and brutal sandbox game are again on the table. If the vision is correctly executed, there will not a "primary" focus of the game, but rather a game that invites choice, imposes consequence, and has a lot to offer regardless of what path you chose to travel. Moreover, if the plan goes as intended, the paths intertwine, creating an even richer experience for everyone.
On a more pragmatic aproach, PvE content means more players and more ways to keep players engaged, which translates into more revenue. It, thus, makes a lot of sense that Henrik mentioned that this is a major focus for SV right now. As the stress test proved, the potential here is immense. On his last live, Henrik mentioned for the first time the possibility of having hundreds of thousands of players, and for that, PVE as content is absolutely essencial (just as PvP, Exploration and Crafting).