The highest reputation from each of your characters will now be account wide, Exalted status will now appear as a full bar with a lock on all current and future characters in the reputation tab.
There will be a new tab will be added to store all your heirloom gear, this tab will let you pull out heirloom gear and use it cross realm. The heirloom slot will then grey out until the piece of gear is placed back into the slot.
Neutral Auction house:
Neutral Auction houses will now be placed in every major city.
Gold Void Bag:
A new feature called the gold void bag will now be placed in your currency tab, up to 10.000 gold will be able to be placed in the gold void bag and the gold will be accessible cross faction and realm.
Summoning stone upgrade:
Only one raid member now can summon all raid members at once, this does away with single clicking each raid member and needing an additional person to click the portal.
Vanity items will no longer take up bag space instead a new tab will be added with the items available and ready to be placed on a action bar, no need for that toy train set to sit in your bags any longer.
Classic Challenge Raids
Old content raids can now be scaled up to your current level and run just like in the old days, new mounts and remodeled and recolored gear for transmogrification will be added along with whole new set of achievements.
Account wide ignore:
Account wide ignore will now be added to stop the harassment of players, Current and future characters of those on ignore will no longer be able to contact the player who has them on ignore in any way shape or form, this includes mail and /say.
Level 25 guilds will now unlock a guild island where only guild members can go; there will be areas for the guild to unlock via achievements. We want the major cities to remain the go to areas however guild islands will have some unique items such as a training dummy that awards extra experience buff when attacked.
Ok well this is wishful (work of my own fiction) thinking but still its something iv had on my mind for a while one day i hope blizzard will do something similar :)