If I rewrote it, it would add an onDuplicated function call to the newly created bricks to allow other add-ons to respond properly, and possibly alter other parts for speed. I doubt I could ever do it, but maybe I could try...
(Plus, if someone else fixed the duplicator, it would be a _very_ good idea to add a callback for the duplicated bricks, because *no* mod should hardcode support for current mods when a generic system would work better. Badspot didn't hardcode events, he created a system to register events and use that, meaning that people could expand his system.)