I think the way this takes whatever camera positions you have and makes key frames from them for you is important. That is you move the camera the same way you normally do and then when you hit Add Keyframe the details are filled in for you. You have to hunt a bit to find the similar interface in ParaView’s animation view and most people have to confront the awkward “Enter camera positions manually” interface instead.
In both ParaView and Slicer we should make it so that more/all of the controls (not just the camera) that vary over the animation are set up in this user friendly way and then manually editable after the fact.