http://www.flickr.com/photos/63374244@N08/9691003054
Well there's a lot to take in but here goes.
* Most terrain has been altered to reduce effectiveness even more- cavalry are especially heavily punished.
* The defence of the cavalry is down and its attack up.
* Siege artillery are even more effective at bombarding but worse at nearly everything else.
* Some generals were changed. Napoleon now gives an attack bonus of 5 but no defensive bonus. Wellington gives an attack bonus of 1 and defence bonus of 6. von Clausewitz gives a boost of 3 each. As is automatic to the game engine their costs have gone up proportionally.
* Transports and merchants are faster but weaker.
* Occupied production rate is up to 100.
* Mud and winter efficiency are 40.
* Efficiency regain is 90.
* Experience per quality and survivability increase are now both 25.
* Chance of revolt per turn is down to 1 with months before auto revolt and final revolt up to 21. Now rather than a number of revolts from a vassal that are easy to crush there can be one big one from that vassal with a far better chance of succeeding which is what happened historically as far as I know.
* Max labs is 10.
* Cost to buy first lab is 1. No price increase but no refund either.
* Austria has the first level of skirmishing already researched and everybody has cavalry charge researched (there were cavalry charges millenia before the Napoleonic Wars after all). Russia has all weather techs researched. Some French research has been gained and some lost. Manpower was reduced proportionately to what % of its total tech possible was added to this country or that.
* A number of land units' quality is down and survivability up. Shock has been eliminated and replaced with boosted attack power.
* Horse artillery are faster but weaker.
The mod only works for the full war scenario. I'm not sure why.