This poll is based on a misunderstanding of Philippe Thibaut sentence. He is not saying that we think that a Napoleonic game with a diplomacy module and economic would have no interest. All the team will be thrilled when the time has come to do such a game.
He is saying that doing a Napoleonic game with the level of details we are heading for VGN will not do.
VGN will have less details in the military system compared to Napo Campaigns or ACW, as players will act at the corps level. See what he says, word by word and you will understand:
as the [VGN] engine would not meet the level of military details required for a good Napoleonic game
On the other hand, we will have an impressive (believe me!) economic system (no micro-managing though, yes we can do that

) for VGN, which will be too much for a Napoleon II...
the [VGN] economic and social engine would be 'too much' for the same
Hope it clears the issues.
Now that clarifications are made, a general comment: Creating a game engine which can sustains many periods and contexts does not mean that our games will be more and more detailed, at all levels. We will have different focus and levels of details in each of our game on the contrary, always remaining with a as clear as possible vision of what we want.