After plenty of reading I've recognized this game will have great depth. I wanted to quickly advise that many of the game settings should be an option where the gamers may choose which major settings/features are enabled/disabled.
For example... let's say the game was to include a major feature such as "Surrendering". Where troops would automatically flee when greatly outnumbered thus preventing any battle and the gamer could do nothing. This is an example of an important optional setting as many gamers would rather choose to control battle decisions.
Another example of optional game settings would be victory conditions. Gamers should be allowed to choose which victory conditions will be available. The default can include all victory conditions, but hopefully each will be optional.
When viewing the map editor for Heroes_3 we can see many great option examples, such as, heroes, skills, items, spells, etc., these were made as optional because as the gamers became more experienced they discovered which ones were extremely powerful and thus sometimes a better game if removed. (ex- dimension door, expert slow, diplomacy skill)
Some of these options can exist within an advanced options tab where more experienced gamers may venture when seeking new challenges.