I am using AE to create templates, so most of the times I end up with a large .aep file including 200 transitions for example. My workflow includes saving all these comps individually (one by one). Thats were the size issue begins!
When I save those individual files CREATED in CS6 -> each file size is less than 1MB
On the other side when I save those file from CC each file ends up 8MB!
Looks like the CC AE version cannot reduce the file size effectively (as CS6 does) when saving parts of a bigger project!