That actually sounds like a very good idea. Mind if I use it?
Fine with me. Bouncing around ideas and suggestions is sort of the point of this topic, isn't it?
That would require the Matoran to stop seeing the Turaga as wise leaders. As well as making them ungrateful little idiots considering that even with amnesia they should know who brought them out of the stasis pods.
The mask maker acting as an avatar of Makuta makes a certain amount of sense if glanced at. Makuta made a deal with Vakama not to attack Mata Nui for a year in return for Vakama not breaking the Vahi.
Of course, sending an avatar is a pretty solid attack anyway and would break the deal. Also it means that everybody would be quite used to calling the mask maker by his real name and would have no real reason to call him Makuta.
Ungrateful or not, I'd still be more than a little wary (at least initially) of someone I didn't personally know, especially if they randomly woke me up one morning and started bossing me around. And given that the Turaga of Lesovikk's home island went completely bonkers and sent their entire village to be rebuilt on Karzahni for little to no reason at all, I'd say that's enough evidence to prove that not all of them should be followed blindly.
Also, I believe that the exact wording of Teridax's original deal with Vakama was that he (as in the Makuta and his forces) would not organise an attack on the Matoran for one year, in exchange for Vakama not shattering the Vahi. Now in this case, the timeline would obviously need to be extended here to account for the generations worth of events that took place prior to the plot of 2015, but if some other being wished to cause some strife on their own during that period of peace, someone who could be easily advised (read: manipulated) into acting on their jealousy or willing to bargain for knowledge and power, and that he technically had no affiliation with whatsoever... Well, that's certainly a loophole if I ever saw one.
Allegedly, the Devil's greatest feat was tricking the world into believing that he never even existed. Assuming that Bionicle's master strategist wouldn't be able to navigate his way around one little pact is honestly a bit ridiculous.