I know, WoD is bad. It's still way more to actually do than in vanilla however. I mean, way more.
The fact that WoD has catch up mechanics is great though. If you came in late in vanilla, you didn't raid.
No one wanted to do your silly attunements or obsolete raids after a year. You got left behind and you had no chance of actually see the end game content. Thats one of the main reasons they changed it because there was little reason for late commers to actually play at all.
Dungeons became just as obsolete in vanilla btw. You didn't need any tactics or CC when you did them geared, just like now.