Three essential preference script changes to enhance your game experience.
In addition to below. I would recommend turning off the radar and turning off the floating flags. It will make the battles more difficult. Generally, I keep the ships flags on because it is nearly impossible to tell who is who in a fight, especially with 30 plus ships. However, in land battles it is definitely better. On a side note, fighting naval battles having only the rear flag as a guide on who is who can be fun as well. The choice is yours. Bare minimum, switch to mouse over.
Developers Battle Camera (really close up and far away views) [Original]
Preferences Script Setting for better Battle AI behavior [Original]
Unlimited Men On Battlefield! [Original]