From what I understand they had their internal communications about things they didn't like in the game and as a result of it things were quietly changed where necessary. Whilst I'm not sure I agree on everything (name/mob changing in Kara/BT and Jokes) I can understand maybe some people didn't like it. At the end of the day they do what they want with it, most of these for me are irrelevant overall and won't be that noticed now, just good memories. I saw the Blood Elf Male damsel quest change and always found it funny, but apparently it's not staying as it was.
Times change, a lot of shows I grew up watching in the 90s and 00s would now be considered offensive and Team 2 obviously feels that was about certain aspects of WoW.