Absolutely not true. virtually everything that was primitive or ungainly about the Nikon F was altered in the F2. The metered finders no longer have to have a special place for the battery, as it is stowed in the camera body. The back is hinged, as somebody already mentioned. The curtains would no longer burn through if left with the mirror up in sunlight with a lens mounted and set to infinity. And owing to the corrugated metal foil construction they could achieve twice the top speed of the F.
Moreover, each metered finder was individually better than the best finder for the F, and each was better than the last, with one exception. They all show aperture and speed in the viewfinder, for one thing,
The DP-3 finder introduced silicone blue cells, more sensitive and much faster than CdS, and a three segment exposure display that is very intuitive to use. The DP-12 is a redesign of this unit for the new AI lenses, which no Nikon F finder had native support for. All previous finders would have to use an AI lens as a pre-ai lens, which requires an adapter shoe to be mounted, usually at the factory, and which conveys none of the benefits of the AI system.
The F2 is a very natural evolution of the F, and it generally doesn't have any brand new and technologically cutting-edge features for the time, but it was a superior camera in almost every regard. I think it's frivolous to say that it was basically an F.