Of course, the Lume should be more important, or should not exist at all, as you pointed out.
As for the case back, I much prefer the new one, and I'm not disturbed that it is not golden, like on the former ones.
I see it as a modern re interpretation of the IGY Logo, which can be seen on the Géomatic, for instance.
This is a well born, conceived and thought watch.
It is immediately percpetible, IMO, as well as with the new Memovox.
Yours is sublime!
Enjoy.
Best.
Nicolas