The only real improvement is the replacement of the door opening button with a more intuitive door handle.
Actually, it's not an improvement. A door opening button is easy to operate with one hand; a handle needs two in order not to shift the microwave. At least all the microwaves I've seen have doors requiring noticeable amount of force to open. My guess is it's to avoid the situation in which a large dish rotating inside pushes on the doors and opens it.
Translated to web, you're basically saying "all websites should use a high contrast serif font at >16pt. to avoid people committing dangerous mistakes when reading instructions online" :)
The analogy is more like web pages using scanned images of hand writing, which I'd also say is bad design.
This can easily be fixed by coloring the indicator mark with a black permanent marker.