Relic swapping was actually implemented in a previous patch intentionally, its not like we're using some "exploit". This is a stupid argument anyway, you don't
have to Spellsurge or Libram swap to be successful, its just something extra to add a little spice. All this change does is to further epitomize just how bad the itemization team is for WoW and put in another undue PvE nerf for the sake of Arenas.
Regardless, confirming that the bags are baseline 1200g:
I am only revered with LC so the discount hypothesis is wrong, Haris Pilton is no longer affiliated with any faction and the bags are always 1200g.