Have you tried using the Camera Crane to achieve what you want to do? It has some pretty good controls for pitch, banking etc. Just move the tag from the camera object and place it on the object you want to animate. Load a spline into the Base link, zero out base height, arm length, head height and width and turn on compensate pitch and heading.
File is attached as well:
camera crane as follow spline tool.c4d
Again, not sure if this meets your needs but it does offer far more controls than what is found in your typical Align-to-Spline tag.
I hope this helps.
Dave