First of all, haven't posted here for a long long time.
Having played the AGEOD games, the jump to Clausewitz can be a bit unsettling as it is real time. I for once have no worries on the actual "battle" resolution. I don't see why the Phils shouldn't be able to ensure that the actual characteristics of war at the time will be implemented, be it the use of skirmishing, frontage, line versus columns etc.. All this will be abstracted in a way that I trust will feel realistic.
On the other hand I wonder how the game will be able to represent what made the essence of the Napoleonic type of war, ie corps level manouvering with eventual concentration for the very battle. That corps level manouvering was the salt of the period, the different corps tried to outmanouver the ennemy and through manouver bring about the very best circonstances for the resolution of the battle. It was made necessary by the need to travel lighter than the 18th century armies, which were slow plodding juggernauts of supply convoys, while the corps (around 20 000 men orginally) could travel fairly light, forage a good deal, protect your supply lines and threaten those of the ennemy. The concentration for battle occurred late.
Ageod Games rendered this pretty well through their use of the March to the Sound of Guns feature (MTSG). in 1 or 2 week long turns, the player often couldn't just do the concentration on the map himself but trust that if battle was joined the corps on neighbouring provinces would join.
How will this work in NCP2 ?
My fear is that this game could end up being a big stack against big stack a la EiA, which would be a shame.