I've never played Runewars, but as far as Warrior Knights goes... It's a political conflict game. Bargaining is supposed to be part of the game.
It's not all bargaining, like Diplomacy, and probably somewhat less bargaining than its successor, A Game of Thrones: The Board Game. Nevertheless, while there are 2-player rules for voting in the actual Assembly phase, you're missing a lot of other opportunities to bargain, bribe, and threaten that would come up in a multi-player game.