I don't think we should change how game works, because end game is most interesting part of the game for those who play seriously.
However, if we want to make end game more interesting to casual players, It could be possible to add some kind of new round spesific achievements to end game. Like for example "send x amount of crop to ww", "settle village on grey zone", "destroy x level of ww" etc. Making these achievement would generate points which would give a some kind of new colour to "to the edge" badge when you reach a new level to it. (+more prestige points) That would let casual players have something to do and still focus on things are important to kingdom despite not having end game hammers. This would also reward those players who focus on one round instead of farming prestige on multiple game rounds, as these players would have more high level "to the end" badges in their profile.