I've yet to read anything regarding the timeline and the juggling of most events in Pre-Mop areas. With the coming siege in Orgrimmar, and the unknown fate of Garrosh, plus the movement of Dalaran to its new/former resting place, there are a lot of inconsistencies in the time line which need to be ironed out and made part of the lore in the old zones.
I'm hoping with expansion 5, we will get to see:
* The new changes in Orgrimmar.
* Stormwind pieced back together (yet retain some showing of dmg - i.e. the old bride in RedRidge. Destroyed and repaired).
* Dalaran seated in a new locale or returned to its former home to help fight a war in Hillsbrad and breath on Lordaeron.
* Remove NPC in TBC / Northrend / Cata zones and replace them based on the character's new location.
* Add in NPC explanatories for certain fights telling adventurers they are going back in time to assist with (insert raid here) much the way caverns of time works, yet not adding to the CoT.
...and make any world repairs needed based on Thrall ending Deathwing (i.e. - removing the stood in the fire achieve, and slowly putting out the fires in zones like Ashenvale and Badlands).
Might just be me, but I would love to see more continuity and up to the minute world views based on what has happened/is happening. Your thoughts? Is brining Azeroth to current time a good idea or a bad idea? Does it help the world and the lore, or does it wreck the feeling of going through it for the first time?