User blog comment:Nick D Wolfwood/Manga vs Anime for canon material/@comment-1712587-20101110142331

The Explanation below is absolutely excellent and is probably the most logical look at things that i´ve seen in a while. The issue i always have with extra material added by anime´s to ongoing series´(Bleach and Naruto are very guilty of this) is that this material very often ends up invalidated by the official source manga at some point. the case in point with DGM i would think is Kanda´s Lotus. for those of you totally up to date with the manga will know that the recent events of the manga have invalidated the Lotus flower seen in Kanda´s room. I also find it can make characters look weak, for DGM i think for General Yeegar to have struggled against such a paltry collection of Akuma when Allen and Bookman held up against an army of Level 3 Akuma, Skulls and Lulu Bell makes the dead General obviously very weak, the fact also that Lulu Bell is introduced to the anime early and fails in her plans makes her impact much less significant in the attack on HQ.

As much as i love anime and watching events unfold in real time rather than in black and white panels the main problem with extra "filler" material is that it can never progress a character properly and ultimately doesn´t mean anything to the story unless completely taken in a different direct (Trigun and FMA did this).