This sounds interesting.
My view is that the Peninsular book, volume 5, is the least good so far. Too much speculative stuff and previously seen scenarios. The production was lovely but that counts for nothing if the content isn't up there too. I can live with the simple format of the earlier books if the content is good enough.
The trick seems to be to create "games" from either entire battles or parts thereof, the Austerlitz series you wrote is a good example.
Straight refights are not the same thing at all and don't bring anything to the table.
I also want to see more than 10 scenarios please, any less than 20 is pretty disappointing given the breadth of the period covered and the cost of these books. I don't mind paying a decent whack for 20 plus decent scenarios someone else has created for us to pick up and play, cost per game for we four Marauders is peanuts at £25 to £30, these books can be excellent value when you look at it like that.
So, bits of Leipzig as you describe, bits of Dresden combining into a biggy, all of Bautzen, Dennewitz, Grossbeeren, Liebertwolkwitz, Kulm, more bits of the Katzbach, Montmiral, La Rothiere, Arcis sur Aube, Champaubert. Lastly I am no expert on the Austrian Neapolitan struggle at the end of the wars but there must be something going on there for us surely?
So I want everything basically - but crucially I don't mind paying for it!
Good luck with this project and hopefully the long awaited 1809 supplement. No pressure!