If the French naming each third is really the reason why reviews are done in thirds (which I can't find anything supporting that), then why aren't those names used in every cigar review?
Taste is subjective. Ive had some cigars not change at all, some change only once, and some change almost with every puff. Does that mean they aren't real or good cigars because they don't follow what the French say? No.
Smoking a cigar backwards, resulting in the wrapper coming unraveled will affect the flavor. The air reaching the binder and filler will be different, and the wrapper may not even factor into the smoke/flavor.
The only real way to smoke a cigar backwards is to put the wrapper on in reverse....but you won't know the filler, and perhaps binder, is backwards. It will look like a normal roll.