Really shameful that we have to look for a workaround from time to time, when they are coming out with a new version, mess up things that's usually working. We've tried out a few things with and he was right, using "will-change" will pre-cache the pixel asset. So scaling an asset from <1 to 1 will make it pixelated.
Setting this to the asset container seems to fix the problem.
TweenLite.set ( [container] , {webkitPerspective: 1000});