For what I understood, the period will be from (roughly) 1715 (death of Louis XIV) to 1815 (Waterloo). So the game will miss the Gribeauval and Vauban innovations.
In term of events, I would like to see the Fronde (1643 death of Louis the XIII, his heir Louis XIV is 4 years old…). Including Louis the XIV to Louis the XV reign –started at age of five- would be a plus, as Louis XIV reign is quite famous for all it wars, and Louis XV (1715-1774) almost losing what his grand-father gained…