Cold posted this just recently passing on the information that the vendor recipes, previously only available on the Twilight Highlands vendors, are now available in all major cities.
This - All major cities will now have every type of profession trainer and their associated trade supply vendor - from the patch notes gave no indication that every type meant every type.
I know I should have expected this change and it will most certainly benefit me as I can roll out new craftables ahead of when I otherwise would have been able to but I've been greatly enjoying playing my alts up through the levels and the Twilight Highlands vendors were a nice endpoint to my efforts.
Of course if the new season PVP recipes are only available in the Highlands then there's still plenty of reasons to level.
Stay liquid folks,