I wasn't jumping to conclusions, I DID check the OGD, and all I saw was Greg confirming Tahu was a Mata next year, I saw nothing about the gold pieces. Looking at it again, I still see nothing about Tahu becoming a super-Toa; It just says the gold pieces are canon, for all we know it could just be regular armor that happens to be gold.
That makes no sense whatsoever. That's like saying 'Well this TV show gets a lot of viewers and fantastic ratings every week, so we're gonna cancel it.'