Sure, it’s a confusing explanation.
1) I made all the characters as different projects. Within these projects, there’s a main charater comp, along with several more comps nested within the main character comp for the face. (The face then has more nested comps for eyes, and a mouth layer, etc). But the expression controls linked to these nested layers are always in the main character comp window.
2) I was hoping to import more than one character into the project to streamline the animating process. There are about 70 shots, and rather than keframing pose changes that might happen from shot to shot, I figured it would just be easier to quickly re-import the established character model for each new shot. Then I could have a separate character model for each shot, and if I needed to break the rig because of any certain poses, it wouldn’t affect the rest of the shots.
3) the final animation will be about 6 minutes long.
I thought about making separate projects for each scene. I know that’s what’s done with most after effects pieces like this. But I thought since having one main project could make it easier to switch working from scene to scene, match action across cuts, and make the big whale more managable in general.