With Medieval 2 Total War Battle Immersion mod you can play as usual, but at the same time you can zoom in on your general and experience the battle in third person. It was originally created by sapiens I just updated and uploaded it here.
Version 1.0 is compatible with mods, too fast or too slow turning speed is fixed, additional feature with banner bearers.
Start DefEdition.exe after you have entered the game. You don't need older versions to use this one