Like you have observed people tend to bunch up. I put forward a while ago an idea that instead of going for a almost totally equal system, how about elevating routes from one house capital system to other house's capital system to be the most profitable. The profit margin would be maybe %5 or more than the current top routes. But not too high to render all the other routes obsolete.
So this would steer the money grinders to there routes and thus bring life to all of the houses.
