Consider fixing this.
As far as the main page itself and not the design in general... it's still basically the same old, boring look. It's all boxy and not unique. Bionicle 2015 has some interesting designs and geometry in many things you see related to it. Wouldn't now be a good time to move past this whole boxy, table-cell looking layout? Besides the uninterestingly-placed graphics and background image that doesn't fill nearly the whole screen on my resolution and is haphazardly positioned, there's really nothing that makes this feel like it's about Bionicle. When I visit the Bionicle website or look at packaging for Bionicle sets, or really any other Bionicle-related thing out there right now, I get a certain feel from all of those. I see rocky textures and interesting patterns in stone architecture. I see text with an interesting blue glow that gives the same feel as the "energy" around the Mask of Creation in the logo. I see bright colored characters. Now I look at BS01, and I see none of that. I see a dark layout with not many colors that "pop", I see plain boxes, and I see a background image that I feel doesn't match anything else on the page.
Honestly? It's a wiki. It's an online encyclopedia, a database of knowledge. I might even say it's already trying too much to be visually exciting. (The background image, besides not filling the screen all the way, feels busy and distracting with all that Matoran.)
The Bionicle website has all that cool aesthetic because it's to grab a kid's attention. A kid is supposed to see that site and think, "Whoa, this site is so cool! Now I'm gonna spend all my money on these toys because that site is so cool!" The text glows, the image flickers, all to draw you in.
BS01 isn't selling toys. It isn't begging you to stay or trying to capture that perfect aesthetic. As a wiki, its purpose is to present its information as clearly and neatly as possible. There's a reason why Wikipedia has kept to a greyscale color scheme for most things. It's not the beauty of the site that matters; it's exceedingly simplistic. It's the content that drives the site. Its simple style ensures nothing gets in the way of its most important function: conveying information.
(Which is why I feel the need to point out the error in the table of contents block. Even if not everyone uses them because pages are usually manageable, it's still a barrier to conveying information.)