Hypothetically, centered alphas on GMK would make this an instant-buy for me, but in reality the large uptick in price would turn me off completely, and I think that would be true for a lot of people who might buy this but aren't hardcore Space Cadet fans. I also think the centered text modifiers are ugly. Normal GMK alignment is fine. That said, I'm in favor of text only or icon only modifiers, but not icon-text, and text only is truer to the original.
Showing my support for 40%, in the base kit or a separate kit.
EDIT: Also, I'm definitely pleased that there are no secondary legends on the numpad numbers. Please keep it that way!