After re-reading some of the Bionicle comics, I realized that during the fight against the Bahrag, the Exo-Toa were completely useless. Basically, the Toa discovered them and made it look like THIS IS THE ANSWER TO OUR FIGHT, but then they try fighting the Bahrag for a few pages, give up, get out of the Exo-Toa, and just fight how they usually do. So why did the Exo-Toa come up at all? I know they play roles in later Bionicle stories, but in that part of the story, they seemed rather useless.