Yes yes yes, that’s exactly what we need, IF, as UE4 stated, the engine is also for filmmaking. Doing everything in engine without other programs as motion builder… look at the iClone animation software for an example. Look at what they say in the 4.10 release info in the editor section first lines:
citing: " New: Added a new experimental editor preference to enable “Sequencer”!
Sequencer is our upcoming level actor animation and cinematics creation tool.
The current version is limited in features and lacks documentation. It’s enabled for pre-alpha testing.
Sequencer is still in heavy development and you can expect to see major improvements with every release.
If you are brave enough to try it out, please be sure to send feedback on the forums or AnswerHub!"
…LEVEL ACTOR ANIMATION &… ect ect
Maybe what we are talking about is about to come 
!
BTW I tried few times with great efforts, merging iClone animations into Matinee…they are on youtube; I am sure it is a matter of practicing the workflow but is was so time consuming that i gave up… Now I want to give it a second try. I love animation, and believe that UE4 is an excellent instrument
edit: oops… Maybe I made a misinterpretation; actor in UE4 is more or less any object in the scene… I didn’t remember till now. It is not a bone mesh, well not only: still hope to see characters with bone (skeletal mesh if I am correct) to be animated within UE4. Be positive, Draian63!