Board Thread:Anime/@comment-26056057-20170603164614/@comment-32657884-20170730195710

Chumbius wrote: I think it was too much to let go of Ymir's past history now. This part makes all part of the character building and dramatic charge between the two and drop it now, it makes the sense lose further.

I think it was meant to flesh out Ymir's arc and help viewers better understand her choices. Expect the anime to give added emotion and visuals.