Actually both Classes are not very filled with cars and different paints to have a complete field of 24 cars. With the last patch the LMP class was splitted to P2 and P1 so there are enough cars above the GTR1 to chose from. It doesn't seem that will be new cars for the GTR1 in the future, because the basic of this class doesn't exist anymore and to get licenses from f.e. maserati or aston martin seems not possible, maybe there could be a Nissan, but who knows? So hat do you think about moving the GTR-X class to the GTR1 similar to the GT1 versions of some cars in Race07/GTREvolution.
https://forum.sector3studios.com/index.php?threads/future-of-gtr1-gtr2-and-gtrx.4610/ Lend your opinion and we'll lend you an ear