I definitely want to be able to export and import characters, but mostly so we have a chance to use them with player created content (even though a toolset itself is uncertain at this point). I asked about this matter at the AMA but it didn't receive a response.
As for your use for exporting and importing characters, I can see your point. There could be a problem with certain things, though, like duplicate items (i.e things that are supposed to be unique), certain quest points based on previous character decisions. Hard to know exactly how feasible or infeasible it might be at this point with too few particulars of the game.