Why on earth would they think that making Russia bigger than it was even in Soviet times was a good idea.
How is a bad idea for France? People occasionally say things along the lines that France should have been happy that they had the magnanimous Germans protecting them from the Russians, but the Russians don't have any clashing interests with France(outside possibly of the Middle East), and Imperial Russia isn't going to be marching into Paris anytime soon. Having a strong Russia is a nice counter block to the British as well, if the rivalry resumed post-war with Germany out of the picture.
Of course this is only referring to strategic reasons, ideologically there would be some differences - but this is also Action Francaise, who would quite like the idea of an authoritarian, highly religious and conservative, right wing state as embodied in the form of Russia.