Well to be fair, none of the Encounters happen at see. Regardless, it isnt something I think would work that well within the rules. You'd assume they would have increased movement, which I think could make using them very difficult.The fact that everyone model must make the same action (special actions aside) means you could end up wasting activations to get your already in combat calvalry to make a combat action.
That said I suppose, were the game to expand, that would realistically be one direction it could do. Thematically though it's not for me.