I agree with a lot o' th' things said here. The non-violence is what made Bionicle unique, BUT I'd quite enjoy epic swordfights like, say, running up a Skyscraper in Metru-Nui, or maybe two winged characters clashing swords in the sky, dipping and diving, creating elemental flashes etc., that'd be good. Otherwise I'd rather have elemental fighting, as great big plumes of fire are more impressive than a fencing match.
Also, the CGI ads are what started me and the combo models egged me on. I remember thinking "Wow, the black one looks cool" and then I looked at the Kaita (something that has been lacking in recent lines) and thought "OMG must get Tahu and Pohatu" and I was saving up my pocket money to get them. The Bohrok pretty much cemented me in for the Rahkshi and most of Metru-Nui.
But then, quite some years later, the "Hordika" wave started chipping at that cement. One piece head/body cover, limbs and some pieces to hold it together does NOT make a formidable villain.
On a side note, it's really nice seeing clever, constructed arguments on here. Even if you disagree, remember that "the people not like us are still people, like us".