I have a late response to this, simply because...
...I can't find the words to do justice to compliment such an incredibly written article!!
There is a certain beauty in seeing your request as a client to the watchmaker - as you described, you're assuming the role as a "foreman", to direct at a high level the skilled craftsmen into materialising your designs. Having a glimpse into the process, the "happy accidents", the snags, the entire journey is an experience that no mainstream watch brand can offer.
Having the worldtimer on the caseback printed on sapphire is still one of those "why didn't anyone think of that before?" designs that off the top of my head is arguably shared by the Lange Terraluna to a certain extent.
Rose-engine turned guilloche to me, is one of those finishes that especially is for the timepiece' owner to fully appreciate when they know how complicated and labourious the process is. One outside of the know-how could easily dismiss it to be possible with modern CNC - which of course, isn't the same due to the cutting methods used.
I hope you treasure this 1/1 piece for years to come!