Here is what MK? for cars and MKX? for CUV/SUVs could look like.....
MKC (new RWD sports Coupe)
MKS (new RWD sports Sedan)
No, no, no, no, O... M... G.... NO!
MKC cannot suddenly become a car after spending 6 years as a CUV. I get what you're trying to do, adding an X to all CUVs, but no, it'll just be a sign of a complete lack of leadership at Lincoln.
Next, MK(letter) for cars, MKX(number) for CUVs, seriously? Sounds like you want to cover all bases in terms of being wrong!
My problem with names and alphanumerics is you set up dichotomy among Lincolns, those that are deemed worthy of names, and those that aren't. If you're saying Lincolns with names are special what are you saying about alphanumeric Lincolns? All Lincolns must be seen as special within their segment, embrace one naming paradigm, eliminate the other.
Re: Grand Continental, I don't like it. I think Continental is the storied name within the Lincoln brand and it should always and forever stand at the top of the sedan lineup. They need to come up with worthy names for their midsize sedan once the Continental moves up in size, assuming it does so. The Continental's purpose is to set the tone for what Lincoln is, if done well it will cast it's halo over lesser Lincolns without having to water down the name by using it on multiple vehicles.
*Finally, let's leave the Town Car name to RIP as a stand alone vehicle. While it was a well known Lincoln, and much loved by some, it still says Lincoln Taxi to me!
* I know bloggin never mentioned Town Car, so that part wasn't aimed at him!