I don't see how raising troop recruitment numbers limits wars in general, unless you're in a realm stuck with a bunch of severely depopulated regions. Of course, under the current looting system it would give realms even more incentive to just mass slaughter peasants, so the looting aspect of the game would need to be tweaked for this to be viable.
But, if killing 1,500 peasants a day in a region is no longer possible, I don't see too many issues with it. People will say that big realms will have an edge, but they have one already so I feel it's kind of a moot point. Also, this would make realms more inclined to take enemy regions as undamaged as possible, reducing the perceived need for mass looting campaigns, which in turn will - hopefully - foster less irreparable hatred between realms, reducing the number of wars fought til one side is absolutely destroyed.
