SO the ones in this 90% PvE game, that tried to focus on PvP were BFA (don’t you remember the intro cinematic?) and MoP (Ill give this a pass because the pandas made anything else Blizzard did forgivable) and Cata.
I can see why you don’t think any expansions focused on PvP because, well, this isnt a PvP game and changing the rules for something as minuscule as pet battles transmog competitions or PvP is ridiculous.