I'd have ended the story in 2008 with a cliffhanger and a "to be continued," then made Bara Magna the proper Generation 2 after a year's hiatus.
Let's face it, BIONICLE had two reboots: a minor one and a major one. Both failed. IMHO, Bara Magna had promise but was handled poorly. The fact that it ran for only a year is still just surreal to me.