There is a lot of work that goes in to it, more than just putting on a suit and recording the animations. There is the pre-process before any of that begans. Knowing what needs recording, drafting, etc. Even the act of recording animations is a lot of work that requires a large process and people. Arguably most of the work is done after where that animation data still needs to be fixed up frame by frame and adjusted; these animations need to be perfected and will change over the course of development as like any other kind of animation. The motion capture is just a foundation for the animation.
Na. A lot were done free hand or from video reference rather than strictly mocap.