I'm not being biased towards the anime, it's just that you can't expect the wikia to be fully revamp just to accommodate the anime's last minute fillers. The anime has been following the Manga up till Episode 19, and at the last four episode switch to their original contents, so we made a sub page for the anime fillers, we aren't ignoring the anime, but we can't just simply accommodate the anime fillers 100%.
Just take the Night Raid page and its navigation template, how are we suppose to set thing there? Then there's the Teigu, like Cross Tail, it's still ok in the manga but destroyed in the anime, how are we suppose to list it all out properly without avoiding any friction towards both media.
And we also have the manga only characters such as Wild Hunt to consider. Just take Ran for example, in the Manga, he was made into a corpse, but he's still alive in the anime, how are we going to change his backstory? Follow the anime or manga, how about the Jaegers page, how do we list it, there are too many issues to try and compromise with something like a last minute filler, that's why we stick with the manga, cause if we decide to match the last minute filler of the anime, we'll have to basically revamped the entire wikia.
So it's not me being biased but we have to decide which media we need to take priority on and edit mainly base on that media. Unfortunately that media is not the anime, but the canon source which is the manga.