I got my XVX Skyline Denim recently as well. Same colorway but not shine through. I don't do any backlighting and the contrast on the double shot looks really nice. One of the reason I don't care for shine through is that without the lighting the contrast tends to be pretty bad. Seems the PBT they used maybe doesn't work the best for shine through leading to dim and not full coverage on the legends.

I also don't actually have a board to put these on yet but I do plan on building something with low profile MX switches like Choc V2 or something where these should work well. Although they are a "low profile" keycap, they're not any lower on standard MX switches than my Devlin Q series. But that means they should be slightly lower than DSA and most other MX keycaps.

Being that these keycaps were not made specifically for the Nuphy, it's expected that the FN legends wouldn't be there. Those are keyboard dependent so they'd have to make different legends for every possible keyboard out there.