I'd argue the opposite.
We visited a time-altered Draenor and we'd expect to see every facet of Draenor changed and addressed. And we did get that, but more of a focus on new things and other creatures but not so much on the different Orc tribes themselves; to the point where most of the 'Warlords' were taken care of in simple dungeons or lumped in to a Raid fight where it didn't really make sense *cough* Kargath Bladefist *cough*
Timeskips would be exactly the same. Focus where they want the story to be told, everything else literally ignored ala Gilneas, Gnomeregan, Mulgore, Undercity, etc. And with Cataclysm, everything was spread out so much and dedicated to the story of that particular expansion that it simply doesn't age well at all. Look at the Badlands and how all the quests there got revamped into everything dealing with Deathwing still. It doesn't age well, unlike Classic which had a very modular approach. And simply said, WoW's story has progressed well beyond having any basic or generic plot line be interesting to a typical 'adventurer'. It'd be great if we were to reboot it all, but as it stands our characters are literal gods-among-men in status and no one wants to go back to killing boars for Farmer Joe again.