Simplify the following text for a Grade 7 native English-speaking person.
Original: Yet , overall , Viollet-le-Duc 's achievement at Carcassonne is agreed to be a work of genius , though not of strictest authenticity .
Simplified: But today Viollet-le-Duc 's work at Carcassonne is thought to be a work of genius , even if it is not exactly the same as it was .