Just to correct a few things :They officially said that 6.2 was the last content patch of Warlords of Draenor. That means that they only added one new tier of content, no new 5 mans, no new reps, nada. This is the most content-lacking expansion they've ever done. I'd almost say they'd better announce not only an expansion but a heavily discounted price for it too at this point, they've kind of royally fucked up.
There are 3 new factions
The new raid is bigger than foundry and highmaul combined (and has just 4 less bosses than both)
Tanaan is a beautiful zone
Timewalking with friends using bc or wotlk gear is fun
It would have been a great mid expansion patch