Is the combo complete in terms of animations, attack data, hitboxes and so on? Is it possible to make it available as a mod replacing the standard Force Edge A combo?
nah, unfortunately the attack data is definitely wrong/missing for that attack- only the first slash hits, and the hit reaction/hitbox doesn't quite match up
edit:
as for content, here's a really long winded vergil combo:
https://www.youtube.com/watch?v=Pu0zRou0CHs&feature=youtu.be
i can't be assed to refine it anymore at the moment