Today's events set the stage for major changes in the game, including the expansion pre-patch, which will include all the game systems, cosmetic and other changes for the new expansion - basically, everything but the content in the expansion's new zones. There has been no official announcement of the prepatch launch date, but if I were a betting woman, I'd say July 10 looks awfully likely. [Edit: All right, or the 17th. But plan for the worst, people.]
Blizzard need to kill professions off as a core game element, because professions stand between players and the portal of an instance. They have been doing it since Warlords. Professions also provide one extra level of player choice and freedom that needs to be tightly contained; they don't want people having to buy enchants and gems beyond what is necessary to keep some pretense at existence.
"Since [patch] 7.3.5 we’re happy with the overall pace of leveling, he said. "If you’ve chosen to start a brand new character right at the end of an expansion, getting a character fully leveled up and geared up to complete endgame content before the expansion ends, there’s always going to be some time pressure there. That’s just part of the nature of choosing to do that at that stage in time."