looks like wow goin backwards or back to the future (reborn) , but what's looks promising is the new content , i think they running a better engine with upgraded character features and many more

link > Warlords Of Draenor

the garrison features looks like going back to those RTS days of warcraft 3 , build, lumber, research,mining, recruit , i wonder they will allow new players to skip all the expansion and direct proceed to this new expansion as it says they will straight raise to lv 90,