Excel charts can't be pasted in now though. The tinyMCE update has caused the most grief for users so far. Not surprising since it touches on a major workflow area of content editing. Most of the grief comes from plugins and themes that were not updated in time with this release. Also there have been a few cases where previously exposed functionality is either hidden or no longer available. It'll only be a matter of time before its all addressed and everyone can forget the great WordPress tinyMCE update kerfluffle of 2014 :-)