Yes and a thousand times yes. They've hit the spot with PoE, and it's a fruit that will deliver a great deal of juice, they just have to keep on squishing it (no sexual pun intended). Seeing that the expansion was actually promised in the Kickstarter, I can only hope that they will expand on the story and continue to elaborate the lore, as they've created a tremendously rich world.
Guys, get those writers working, and with a good raise, the engine is already pretty good so all you need now is to focus on delivering more awesome writings and stories.
Thanks for reviving the RPG genre, which I thought lost.. (Even with these new RPGs like D:OS, DA Inquisition, or Skyrim).