What do you think - which things in wow dont belong there?
For me its:
1. MoP as a whole expansion - yes, i play MoP, but whole China-like architecture, quests, Npcs , its just feel alien seeing it in WoW, not to mention pandaren race and monks.
2. Netherstorm npcs and whole area in TBC - its like they came from the far future
3. Deathwing as a villain - just does not fit here
4. Harrison Jones - yes, good tip for him