The point of the game mode is to try to decorate the way you like and you can put in as much or little effort as you like. A grading system would gamify it to the extent of being annoying and I wouldnt bother with it. Its like the switch hamster game (Djungarian story), I wanted to be able to pet the hamster but its a mini game. Why does everything need a win condition to be interesting?.. I like the chill nonbiri pace of the way it is now. I like that I can "cheese" a build if I am not really feeling it and come back to it later. Why you would want to just play it like that I do not know though, then you might as well not play. Its the same with people who hack in mmos and such. Like why play it at all at that point.