Cheers Din!
I was thinking that it was definitely too one-sided, so might consider adding some elements of the Austrian Reserve Korps as a scenario-balancer. In reality they were kept busy just to the north, around Aderklaa, but they were very close.
One day of course, we'll have to do that whole front of the battle, including Aderklaa and Wagram. The whole battle might be a bit ambitious… While I might eventually have all the troops necessary, it would require an L-shaped table 20 feet long and 10 feet across the base of the L...