Dear Nicolas,
I don't know if your post was truly focused on grey dials, since I've perceived a certain nostalgia...
Anyhow, I have to say that me too I love dark-grey-dialed-watches: I often find them intriguing. Moreover, the use of dark grey shades are quite rare in contemporary timepieces.
In regard to Mr. Lambert, I think he undoubtedly has made an enormous work on the JLC brand and JLC watches, but I must confess that, despite the very frequent release of exceptional proposals (and a lot of dream-watch of mine), I still find a part of their "continuous" catalogue a bit boring.
I wonder how the Manufacture will evolve in the future, I'm very curious about it and I'll stay tuned,
Ciao,
Elio