I'm going to come out and say it: the 2003 Bohrok-Kal arc is the worst one in all of BIONICLE. People get on the 2005 Hordika arc, but there was some cool stuff in there with the characters, and also the sets came with flying spinners. The Bohrok-Kal are reskinned Bohrok with shiny bits, and the entire thing is silly.
C.A. Hapka is doing her best with what she's got, but it's still pretty weak. At one point one of the Matoran is trying to describe the thief of a Nuva icon, and he struggles, when all he should be saying is, "It's a Bohrok, but shinier!" considering that they have reprogrammed Bohrok walking around all their villages.
It also doesn't make a lot of sense? Yes, that the Bohrok swarms have a failsafe isn't that out there, but given we're told the Bohrok aren't evil, just a force of destruction awakened too early, why oh WHY are the Bohrok-Kal such massive douchebags? They're proud, sadistic, power-hungry, and all-around unpleasant.
And WHY is it that the Nuva icons are needed to free the Bohrok queens? That's a connection that is never explained again, unless I forgot something. Also why the Toa Nuva lose their elemental powers when their Nuva icons are stolen, something that isn't brought up later on, and is nothing like how other Toa in the setting work. It's a transparent way to add more unnecessary drama by way of making the heroes helpless, and it's already annoying because once again, the Toa Nuva start the story like "Well we don't want to work as a team becauses teams are stupid," meaning they have to learn the team work lesson AGAIN.
The title's dumb too. Makuta's not in charge of the Bohrok! He just flipped the switch! The Kal are just the failsafe! This book gives us a couple of chapters from his perspective to make us remember he still exists, but this is so, SO not his show right now. He's just chilling in the background until the next arc.
Thankfully, there are a couple of really strong elements in the story. There's a great scene with Jalla telling Tahu to stop being so proud, and I like it. I like the interactions between Toa and the people they protect. This book also introduces the Mask of Time, and even though it's complete BS that it doesn't work on the Bohrok-Kal (a force field prevents them from TIME BEING SLOWED???), it's got cool bits attached to its story here (in the comics it came right the fudge out of nowhere--this book gives setup). And the way that they do defeat the Bohrok-Kal--feeding them too much power so that they're own powers go haywire and destroy them--is really cool and I've always loved that sequence.
Next book in the series is, from what I remember, pretty good, and the first one by GregF. So I look forward to that one.