Yeah FWD luxury sedans have never made sense to me, especially as a brand flagship.
A certain few GM's come to mind.
Yes and no.
Keep in mind that Cadillac going completely front-wheel-drive was a big step in a bit of a "sign of the times" change in the mid-'70s. Going front drive allowed them to make even larger interiors, and overall, sell on some kind of idea that they were more fuel efficient than the competition. As much as we laugh at the idea of a front-wheel-drive, 500ci, Cadillac El Dorado it was the norm. And it worked... Until the Germans were taken seriously in the US, and then it all went downhill.
Today, I feel it is more or less a case-by-case basis. By any and all sense of measure, the S-Class and the 7-Series are the absolute definitions of luxury and performance and I doubt that much of anything is going to change that. But, attempting to think of brands that have front-wheel-drive models as their top choices, technically speaking, it's only Cadillac, Lincoln and Acura playing that game - and all of those vehicles are sold as all-wheel-drive models. In the case of Cadillac, ask anyone at GM, and I think they'd be pretty quick to say that the XTS
isn't the flagship model, and would probably point you over to the CTS for that duty at the moment.
Overall, I think you have to consider what exactly Americans define as a luxury experience at this point. Far more often than not, it seems that while outside the US it is a preference toward being chauffeured, it seems that Americans tend to lean more toward isolated comfort. But even then, the luxury segment is stretched so wide these days, it's difficult to place a lot of the all-wheel-drive models against much of it's foreign competition. Its not ridiculous to place something like the MKS or the XTS at or near the top of the heap to the
average person... But, we aren't average people on here.
RE: A Lincoln Personal Luxury Coupe or Sedan
All of this depends on the kind of image that the "Lincoln Motor Company" wants to create. As of now, it seems that they're hanging their hat on flowing styles with upscale personas - not necessarily a Cadillac competitor directly, but more than happy to knock gloves with Lexus, Acura and Volvo. If that's the case, I'm not entirely sure if Ford will be willing to pull the trigger on something that interesting, particularly when they seem to be so dead-set on introducing fairly okay vehicles.
Assuming that they were to go ahead with the project, I think the straightforward way to go would be to jump on the sedan-coupe trend ala the Volkswagen CC/Audi A7/Mercedes CLS/etc. Base it on the Mustang chassis, and give it a decent stretch. Something the size of the A7 would be perfect, I'd think, even with rear-drive as the only available option. I'd avoid going with V8 power initially, and offer only EcoBoost I4 and V6 engines. The 300+ BHP 2.3L unit would be more than acceptable as a base point, topped off with a 400+ BHP V6 to possibly be it's own tweaked unit based on the one currently offered in the MKS. Overall, I'd want the style to do its best to emulate the MKZ in a more muscular fashion. To this day, the MKZ is still a head-turner for me, and I think the overall style could translate well to something larger. Other than that, keep it simple. Equip it competitively ala Acura, with lots of standard features. Tune the ride to be supple, don't try to go overboard with the sportiness. Its a Lincoln, and nothing is going to change it. If it does well, and people demand it, offer a sport package later on... But don't go crazy. Kick it out the door in the mid $40k range with the EcoBoost I4, and I think you've got an interesting case.