I saw this too, and I thought it was kinda short notice to quickly change the route to seasonal. It returns late March/early April. Flight has operated for three years on a year round basis and I think they increased the frequencies this year as well. Neither FCO or CDG are operating from CLT during the xmas holiday, which I was think is weird.
It seems that CLT-CDG is now a 767 route as well, instead of a A332.
Could the aircraft from CDG be used for the upcoming GRU flight?