Iclone 5 had a great way to follow an actor that was smoother than using the attach or align features.  Unless I'm using avatars with bumpy motion roots, I can't get a smooth motion because it bobbles while it flies.  Another feature I miss is the "fly to" and "walk" camera motion controls-- they were very useful in getting the camera to the location you wanted, now you have to inch your way in and it's cumbersome and frustrating.

--Ray