Guda,
No advice for you, I'm afraid. I came to almost the same conclusion you did about HistWar. I wanted to like it, but no. Try the NapMod and see. It's not perfect but it can give the flavor of Napoleonic conflict. Just remember -
1) Infantry Squares are pretty much for show. The AI doesn't use them,

AND they can be broken if they get hit enough. I like them for the "coolness" factor. Also, always TC them. This keeps them from constantly trying to face the flag towards what they are trying to shoot at. (They don't have flanks, but are reacting as if they do.)
2) Another thing is you might want to reduce the average musket range to 100 yards, but keep the skirmisher muskets at 120 or so. Gives the skirmishers a slight advantage which they would have had.
3) One more thing - Cavalry can be devastating in the NapMod games, and there can be a lot of it. Always keep your eyes peeled for them. They charge, break and rally constantly so if they bug out for some reason, they may come back unexpectedly.
Jack B)
American by birth, Californian by geography, Southerner by the Grace of God.
"Molon Labe"