I'm not sure if anyone requested Nagnang Arena to be changed this way. The shop and Stone Pit were also changed; I'm disappointed because Stone Pit looked great the way it was, and now it has three green carpets that make no sense. Forsaken and Village Arenas are unchanged, and that's sort of a relief, even though they could use minor adjustments.
Regardless, the side rooms in Nagnang Arena are rarely (if ever) used. Sadly, even Sire Pit doesn't get many visitors anymore.