Hi,
when you have projects that are having performances issues, the best thing to do is to start profiling with Unity Profiler.
From your description, it's unlikely an issue with PlayMaker itself.
indeed your scene is not enough, make sure you package the scene properly, and test it on an empty project to make sure it features all the things you need. For example, that scene doesn't have a camera and is missing a prefab ( which is likely the fsp controller right? but which one exactly is it?) what version of Unity is it? 2017.1 or 2017.2?
I suspect it's an issue with the camera not following on late update, and so the camer movement is jerky. Can you check the game stats, what fps do you have?
Bye,
Jean