I understand the reasoning behind it but didn't this lot that are now sharing the end with the away fans position themselves to the right of the away fans (as you look from the away end) at the side of the pitch next to the screen anyway prior to this move?

I'm not sure how much reducing the away fans and simply moving the vocal Reading fans to the other side of the away fans improves atmosphere.
If the aim was to reduce away fan noise then I can see it but if it is to increase atmosphere as a whole then why not just leave the away end intact as the full end and install the singing area as the section next to the away fans near the screen?