Got three.
First Link
Second Link
Third Link
So yeah, a guy named Thomas Tippl is now the COO of Blizzard and head of the "Blizzard Business Unit", and he reports straight to Kotick.
Firstly, Tippl is not the COO of Blizzard. He's the COO of Activision-Blizzard, the parent company post-merger. From first sentence of link 2:
Acitvision chief financial officer Thomas Tippl was recently promoted to the position of chief operating officer at the publisher, and will serve double duty as temporary acting CFO while a replacement is found.
Secondly, given that Blizzard was owned by Vivendi of course meant that Morhaime was not the top honcho overall, and still reported to someone at Vivendi. Now he reports to a different guy who reports to Kotick. That's pretty normal I would think when one company owns another, but it doesn't automatically imply that the owner is going to start messing with Blizzard. In fact, the third link points out this fact in two places:
Santa Monica-based Activision Blizzard Inc. has divided itself into four units, with one focused on the military video game Call of Duty, another handling other internally owned properties such as Guitar Hero and the Tony Hawk skateboarding games, and a third handling licensed properties. Blizzard Entertainment, maker of the successful online game World of Warcraft, remains an independent unit.
Notice where it says that Blizzard remains an "independent" unit. And:
Maria Stipp, executive vice president of owned properties, is now overseeing all internally owned titles besides Call of Duty and the ones made by Blizzard.
Pretty much sounds like Blizzard is still overseeing their own properties.