Hey Adam,
Unfortunately it seems Alembic only exports polygons, and I was working purely in splines. Bit of a bummer. However, I’ve just discovered Bodymovin https://github.com/bodymovin/bodymovin which allows you to export AE shape layers as JSON files which is perfect for my needs as I was porting everything over to MaxMSP.
Thanks again!
Chris
http://www.lumiko.com.au