While replacing the nest with an AE comp may work in some situations, in others it wont. AE doesn't translate (all) trasitions between clips.
The only way at the moment is rendering the specific part of the timeline or the nest itself through the project panel, then replace it. Not the most user friendly way.
Yes please - I need it for Twixtor as well. Could someone give a status for this? Seems like a simple thing that a lot of people have needed for a long time. Thank you