Why so much scale?

I’m currently on the 5th episode of Season 4 and every challenge so far has been way more focused on making their creations big for no reason. Season 3 and prior were basically all judged on technical skill, concept, and design, but in Season 4 every challenge seems to include scale as a factor. It’s a cool gimmick for a couple challenges but it’s weird that almost every episode so far has been judged on scale with the other criteria