You should be able to keep the camera moving in the direction of the last input even if it’s not being controlled by the player currently, and you can achieve your ease effect by using the “Ease” node, or just vinterp node (vector interpolation) where it’s gonna continue the auto movement on a fixed speed. And you can place delays right after the input actions to reduce that snappiness. You can plug the results into the set world location / set relative location node of your camera component to adjust it’s location and the set world rotation / set relative rotation to adjust it’s rotation in the dynamic approach using blueprint codes. But if you have certain scripted scenes in which the camera’s gonna have pre-determined movements, you can use sequences!
I hope I was able to guide you on your goal, even though I’m currently not able to provide you some example screenshots. But I think these are some decent starting points 