The Richeville has always been an interesting and charming line and my two favourite models are the perpetual calendar ref.27220 and the pc minute repeater ref. 99600.
Those two for me are among the best Tonneaus ever.
I think that for now a return of the Richeville in the current production is very difficult because off its particularity and because it is not the best moment on the market to launch such a model. It worths especially for GP, a brand that in the previous years did not go very well, so it has to release model that are sure (or almost) to be successful.
However personally I would love a return of this model but only in a tonneau shape.
Best.