It probably depends, circuit-to-circuit. In the WMD pre-release Project CARS 1 days, they had a fully-modern Suzuka layout called Sakitto. Upon the release of PC1, the 'Sakitto' name remained, but it seems that had to change the layout into a fake Suzuka layout, at the last minute. It seems for some circuit owners, only the name is everything, and for others the layout(or both) is everything.
I agree - Mulsanne at night is spectacular. My fave part, however, is from Arnage to the Ford Chicane. Maison Blanche reminds me a bit of the Masta Kink at the old Spa. The modern layout with the chicanes doesn't do much for me.