But the questions is , who can fix this train wreck? or who want to invest their resources (time and money) for this rotting invested maggot cow?
As someone who has started reading the manga proper and is a tad invested in the ongoings of early canon, it would take someone who has a newly discovered passion for the source material and in a position with resources and ability to do a new adaptation of the story. Rurouni Kenshin had a new adaptation of the Kyoto arc in 2011, and Hunter X Hunter had a full new series as well.
If they can change the ending for Rurouni Kenshin like it was done in the OVA, they can do it for other series, so it is not out of the realm of possibilities for an anime to take things in a different direction, especially if we only need to to redo say, the last 5 volumes of the manga.