I love the matte case, and do feel it's worthwhile. I'm sure it will turn glossy over time where it's most used, but that happens with every keyboard / laptop I've used.
I'm looking forward to seeing what the badges look like as I'm still toying with ideas of customising that part in the future... although if it looks awesome as it is, then I may not decide to do that after all
ED mentioned that the plastic logo will still be behind - so I think that the plan is for the adhesive piece to be a darker than example metalic color pre-cut to the same pattern as the aluminum bits he had before. I.e. the light would still be coming through the dp lid logo plastics and outlined by this thick adhesive plastic inlay pre-cut to pattern.
The matte black really looks good.
It doesn't sound like you need to tweak any of the tolerances either, which was my main concern and something that happened with the Pandora.
Thank you for taking the time to research solutions and find one that works!