What do you think about the "Palais Chaillot", on the Trocadéro, in front of the Eiffel Tower ?
Maybe it's timeless, but it's also charmless ... It has no soul, it's a classic/greek/renaissance pastiche like a lot of fascist buildings from the same period. I prefer the brutalist buildings, because they are the witnesses of their times.
But I agree that sometimes, neo classicism is more suited to our way of life. A small city near Paris, Le Plessis Robinson, has switched in less than 15 years from the typical "banlieue", with hideous towers, to a fake typical old french city (fake old church, fake old market, fake old city hall, etc). http://www.plessis-robinson.com/uploads/media/DSC_8867.jpg
I think it's a beautiful pastiche. Quality of life is now very appreciated here.
Here are some pictures before/after : http://www.pss-archi.eu/forum/viewtopic.php?id=34108