+1 for that idea
Also, I think the EXR issue is not one easily remedied, because at the base level AE will never be Nuke and vice-versa. Nuke is built from the ground up to handle multi-channel EXRs, that's just not how AE works, and that's fine. There is some overlap but they are really tools for different things. Compositing multipass renders is just better in a node-based compositor, even the "free" autodesk Composite is better for that than AE. But I'd shoot myself before trying to do motion graphics in it, or time layers to an audio track. It's just another tool in the toolbox