Sorry to say, yes, to get smooth camera movement one must adjust the animation curve tangents. Some tips: Create a camera in Maya with an aim and an UP versus the stand perspective camera. For even less animation curve spline side-effects, download and try the camera rig from highend "Camera Rig and Roll 2.0". Another helper, set your prefernces/Settings/Animation/Tangents to "Weighted" and Flat or Plateau so new key frames atomatically ease in and out. Read the manual sections on the graph editor and adjusting tangents and weighted and free tangents
