Machine oil and coolant, not to mention swarf, is nasty stuff. It should never be allowed to make it to a customer. I imagine grinders like this are a huge pain to clean well given all the nooks and crannies. The cleaning and stages, as well as the drying racks, really stuck out to me as a nice way to scale up their operation.
Leaving the lids bare without any engraving was a great choice. I specially requested it removed from my Aroma 3, and it's beautiful. Really lets the design of the grinder shine. The OMD grinders are so iconic at this point there isn't any need to obviously brand it.