I have also ridden the back row both forwards and backwards, and I would be disappointed if they changed them again. I didn't find forwards at the back to differ in experience compared to the other seats.
Personally I love going backwards and feeling the near misses whizz above your head, and you actually have time to admire what you have just missed.
I'm not sure from Thorpe's POV why they would make this decision. It gives people an extra ride experience, and that worlds first title we all know they love and adore.
It won't bother me too much as I enjoy both experiences, but I look forward to having it confirmed