A number of top talents have approached Vince McMahon in recent weeks voicing their concern over WWE's current product according to PWInsider.com.
One of the top talents had a verbal back and forth with McMahon in front of everyone. In this exchange, the talent basically told Vince the writing sucks and that McMahon doesn't have his finger on the pulse of things anymore. Since McMahon is out of touch with wrestling in 2012, the talent told him he needs to start listening to people around him. The final note was the talent saying when WWE goes to "hell in a handbasket" it will be all Vince's fault.
As of this time, the identity of the talent hasn't been confirmed to the point of being able to name them according to PWInsider.
McMahon's top stars, along with pressure from NBC Universal to fix the ratings is said to be a huge slap in McMahon's face. This all played a factor in McMahon making drastic changes.
Reportedly this is only the beginning and more changes are coming.