Are the Matoran of Metru Nui/Mata Nui stronger in their original forms that they had in the 2,004 sets, or the forms they got rebuilt into from the 2,003 sets (being the forms that they rebuilt themselves into to compensate for how they had shrunk and weakened while they were asleep)?
(Personally, my guess would be possibly their rebuilt 2,003 forms, given that they look like they used scrapped parts from their formidable foes, the bohrok; which would also provide an explanation for why all matoran across the MU don’t have the upgrade,- there aren’t enough scrapped bohrok to go round.)