First thought when I read the title: generally in countries that Orthodox christians are a minority, in opinion of inhabitants and the goverment of the city an Ortohodx temple won''t be "good for skyline". Recently we had similar situation in Warsaw.
The cathedral look very fine, truly Orthodox spirit, very elegant (it suits to Paris) but wihout this roof, as some of you mentioned before. It woudln't destroy the general order of Paris' architecture. I don't see any rason to place this horrible roof. Is there any explanation for it?
BTW, in the article it looks as if Orthodox christians were only Russians in opposition to "universal" Roman-Catholic Church: "With 165 million members, the Russian Orthodox Church is the second-largest in Christianity after the 1.3-billion-strong Roman Catholic Church"