They should have just hired HIRO to make the official manga.
A serious missed out opportunity.
I think the artist they picked for the new sequel manga, who had also done fanart before, is about as good a pick as Hiro would've been: https://bibibi-comic.com/episodes/f31d49c0e77a4
I do hope the mediocre movie adaptation manga can be redone with a better artist and expansions rather than cuts at some point but I can't say I care too much about it since they started the new one.