"Haussmannian buildings" is a generic and often inaccurate term. Haussmannian planning is more meaningful. Tons of buildings in the Haussmannian fabric were actually built for the 3rd Republic following Napoléon III's rule and the 2nd Industrial Revolution. Lots of buildings of that era are splendid...
Haussmann was a senior official, no politician, and a brilliant urban planner IMO. I wouldn't hold him responsible for Napoléon III's régime, even though he was influential and successful under the 2nd Empire. What would you have done in his post? If you think you would've been as ballsy, good for you. He tore down many more slums than precious hôtels particuliers in Paris. I think most neighborhoods he redeveloped, such as that of the Opéra Garnier were miserable, run-down and murderous areas prior to his work.
He served in Bordeaux before being appointed préfet de la Seine, and his redevelopment of Paris was straight inspired by what was achieved in Bordeaux for the 18th century. Old downtown Bordeaux may be my favorite in the entire country. It's a gem of high quality limestone consistency, pretty much like stereotyped Paris, but older, feeling more genuine and only 3 or 4 stories tall in average. Here's an example of a mixed-use contemporary redevelopment in Bordeaux's old downtown where it's hard to deal with modern/contemporary architecture, owing to its historic traits.
http://forum.skyscraperpage.com/show...2&postcount=37
That won't revolutionize design, nothing groundbreaking, but it's still contemporary and stylish enough, entirely cladded in limestone to stay in tune with the rest of the downtown fabric. I think stuff like this could be good for Paris. In fact, I think
highrises designed like this style would be interesting for
Central Paris and a few western suburbs, but probably not over la Défense that's exclusively modern. Limestone would likely be boring in la Défense.