If you want, on the dev version of OpenFL and Lime we are working on a new SWF file format which is temporarily called type="animate":
<library path="my.swf" type="animate" preload="true" />
The dev version also uses this when running openfl process my.swf to process a file in advance. The goal is to finalize a backward-compatible format which is the same when processing individually or when embedding as a library.
This library also uses the newer AssetBundle type in Lime which is a zipped library – so an animate-style SWF library is zipped into only one file per library
Would appreciate any help testing it or contributions to continue to improve it! @rainy it was directly inspired by your work 