Visutainment,
Here is a quick and straightforward way to take the existing animation, and adjust the areas that you find not smooth enough in the simplest way I can think of.
Project-file and screenshot
https://www.amazon.com/clouddrive/share/gtDVqpWi99T71atGB1sC0Giy9KROOShg7TjjbWQx4lU
What I have done: (Make a copy before you explore this)
• Selecting the Render Camera, and use the Main Menu>Animate> Add Motion Clip…
• This clip contains now the whole animation, like a filmstrip.
• I went to frame 150 and use the Timeline> Motion System> Cut/Connect function (This needs to be shut off when done!)
• I created a cut into Frame 150.
• I dragged the new start and ends over each other, which automatically creates an Ease-Ease transition. The longer the overlap, the smoother the transition.
• This can be done as well with a Spline interface, as shown in the screenshot.
I hope that works best for you.
In the file, you might notice that I have given each camera not functioning as Morph “parent” the same rig. As long as there is a single keyframe, you can create long or short Animation Clips for each. Again, the rig must be the same! Then you can mix and match those, and have the transition as smooth as wanted.
I have discussed this in detail here:
https://www.cineversity.com/vidplaylist/animation_techniques_for_teams/animation_techniques_for_teams_part_01_course
My best wishes