To provide different, quality options of playstyle is in the spirit of Mount & Blade.
The problem is, right now some of those playstyles are in conflict. For example, in order to make a good merchant simulator, you have to make it more difficult for people to get denars, so as to give being a merchant value. However, that conflicts with what I want to do as a simple mercenary or warlord that does not want to bother with being a merchant, because those
"merchant mechanics" only make life more difficult for me.
The really simple solution is to give players more options to customize our games. The game gives us numerous choices when we start a new campaign. For combat, we can set how much damage we receive. On easy settings we take one third damage, on realistic settings we take full damage. For travel, we can choose between having a 10% movement speed bonus or not. We can even choose whether our companions can be permanently killed or not. However, for some reason, there are no choices when it comes to the economy.
Imagine if there was a choice between "realistic" economic settings and "easy" economic settings. That would make both of us happy.