At the start of rep v rep warzones, the voice is from rep v imp warzones instead. Dunno about imp v imp
1) Played one Rep v. Rep Civil War match this morning where I was on the Imperial side but rather than being in a Republic ship I was in the Imperial ship with the Imperial voice. The Republic warzone simulation voice and the other Republic ship was absent.
2) Played a Rep v. Rep Huttball match yesterday wherein the huttball failed to appear in the middle.