Looks like all the race change stuff has been worked out judging from the number of holy cows I saw dancing in org last night.
If not for all the longevity achievements and such I'd lose, I'd think about deleting my UD rogue and starting new as goblin seeing how easy old world questing seems now compared to previous. Extremely heavy on the breadcrumb to quest hub, complete hub, then crumb to next like in wrath (and somewhat like BC although perfected more for wrath).
On an unrelated note, I was going to delete all the addon saved data before playing yesterday, but with the patch I just loaded up to get it installed first. Not sure why, but after the patch I had no disconnects from using any of the addons that before would be a 99% guarantee to d/c nor did I get knocked off during flight when tabbed out. Still need to delete my gatherer file though as that data with changed terrain is now seriously defunct.
As far as old world quest, seems they deleted all of them from everyones logs, BC/NR seems to have all stayed. They even have reset everyones progress on them (at least most) so you could go and do them again. Seems this was blizzs way to make sure no quest progression related bugs as even areas with no significant terrain changes still had minor adjustments. My main didn't complete loremaster, but was like 630/685 in Kal, but looking at the individual Kal areas now shows maybe 2 dozen complete quest and over half of those are pegged under the completed Sith area which seems to have seem fewest changeses of all zones.
Also, love those crashing AH prices and reduce required reagents. After last night I have about 25 complete darkmoon decks and enough non-complete cards to make about 25 more.