greetings, i will say some words for your scenario
1-too easy, try to make some more troops, and the english, ... they were having less advantage over the french..
2-the english had little troops than the french but more trained troops........ make some condition for Blucher's prussian reinforcements.
3-too much troops....i had lag on my computer
4-the rest of the terrain was, stupid, the La belle alliance, were napoleon stand, was more larger, and Mont saint jean, were you stand, also was larger
5-eyecandy,the terrain was a crop field with farms and grass 3 and dirt 3 .besides, there was mud