Derek, will FE have SP style Multiplayer? As Shogun 2 has shown, people will play long times if the MP is interesting and rewarding.
And people who want to play alongside their friends simply don't have the requirements of speed and quick wrap-up that most competitive MPers do.
"If you build it, they will come." That saying is true a very high proportion of the time, for practically everything worthwhile to people. Don't put SP-style multiplayer (when the goal is fun and co-operating to defeat a tough AI team) in the same "too-hard" basket as competitive Elemental (whose concept simply doesn't work). And so far, SP FE looks to be avoiding many of the mistakes of WoM, so even more reason to consider an SP-style multiplayer mode.
Best regards,
Steven.