I'm not positive, but I would say it's not a stuff pack because of the amount of objects they put into it.
Between the sectional sofas and the new kitchen that probably ate up a lot of the budget. Kitchens have a lot of unique meshes inside the one sofa configurations.
Also they updated all of the current counters to accommodate the counter top stovetops, which has been confirmed that they will work with all counters. I'm not sure if there is an actual oven for baking that snaps into the counter like the dishwashers do or not, but if there is, all of the counters would also have to be revisited to make that function as well. So that's more time and resources used up that would have gone to game play items.