I think this is likely something people who play WoW as a lobby game consider to be the case. However, I don’t think this is relevant to WoW Classic or WoW Classic: SoD, while I do think it’s the case with something like Wrath Classic/Retail.
This is an odd one, because PVP has never been balanced around 1v1 in any version of WoW, so it’s hard to know where people are coming from, but there’s pretty excellent balance considering that reward bearing PVP is currently 10v10s. The only question is whether Paladins or Shamans on your team makes enough of a difference to call that (im)balance.
Cool. I wonder what sorts of innovative games people who are saying this have developed lately.