I just though that now we can also leave everything regular human size and not try to fit everything into wider Melvin dimensions. And it’s even cooler since I can see him fumbling around stuff that isn’t fit for him. His secret lab though can be all Melvin proportions.
By the way Melvin is not the Spice Vendor slave, remember he is more what Alfred is to Bruce Wayne, not a butler but a faithful confidant. Melvin probably arrived at the house when one day The Master Vendor bought some travelling equipment with Amazon Prime delivery and when the package arrived he somehow had to pay a fortune in shipping weight, he was like what the hell, and when he opened the box, well, no travelling equipment there, somehow Melvin got delivered instead.