The new glass is more traditional in many way, such as in terms of its subjects. And there is no meaningful way of restoring Notre-Dame to an "original style"

The new glass is more traditional in many way, such as in terms of its subjects. And there is no meaningful way of restoring Notre-Dame to an "original style" without making it unrecognisable to us - it consists of many hundreds of years of substantial alterations. While Viollet-le-Duc tried to find a compromise that worked, the result is that it is an eclectic 19th century mix of styles that never existed previously.