It's certainly not "a change of heart". You don't stop and then backport a few elements of something as fundamental to system stability, security and performance over a weekend and push it out in a silent "fix".
The elements pushed our are almost certainly required by IE10 and have been part of the W7 IE10 build for a while.
The elements pushed our are almost certainly required by IE10 and have been part of the W7 IE10 build for a while.