The Art of Combat - Melee Combat System for the Unreal Engine

I guess I’m a bit confused about what this pitch is for exactly. Is it meant to be the “exclusive” thing for previous buyers (and any new people that buy TAoC?) Also, this is something that won’t be included in the new system that we’ll all need to re-buy since it doesn’t appear to be an update? – so it’ll be missing the special feature?..just a bit confusing is all