Corner legends on cylindricals is a convention for showing which modifier/combo is used to get which symbol.
Giving modifiers corner legends and centring legends on the number keys on the numerical row breaks that.
Having some keys be left-justified and some centred looks unprofessional.
Many modifier symbols (Shift, Control, Alt, GUI, Enter, Pause) are both non-standard, I don't see how they would be more intuitive ... and they are ugly IMHO.
A blank set would have been preferable, IMHO, but that is not an option.
I wish that the keys had struts inside, so that they would be compatible with O-rings.
Too bad for what could have been such a promising profile.