This and an eventual integration with Shield Battery would make the complete package, with the added plus of increasing the level of play by allowing people an easy way to study other players build orders and strategies. If it was implemented within the replay viewer itself that would probably be the best spot for it. Or even just having it as a plugin for the replay viewer you could choose to download on the side.
I know that Shield Battery has not been very forthcoming in their support of your project so far, but maybe in the future it could be worked out. Time will tell.