"The main character is powerful, we get that. It is also hinted that he is capable of leading his undead army onto battle and pull out a decisive victory during his conquests. I was hoping that I could command my soldiers myself during these battles that I only hear happened. This would not only emphasize how powerful and intelligent the main character is, but it could also extend the story a bit with some action."
Actually the battles you entered (that were important enough to be mentioned) were described in some good detail, and the most important ones (the ones where it was possible for you to lose - the taking of Nuro, killing of Velzix (in both the Demon and Death path) were greatly controlled by yourself.