Huh...this is kinda interesting. This notation does produce a nice symmetry on the dial: four "I" numbers, four "V" numbers, and four "X" numbers. Satisfying, indeed. Roman numerals are terrible anyway, so I fully support any effort to butcher them.
Roman numerals are nice because they don't steal attention when you aren't trying to read them.
General, intrusive text signage is mildly psychologically harmful.