If he was open to change his mind, that's cool. It's hard to find good sources for anything going on in this controversy, especially considering the fact that it seems to come up any time anyone is talking about Ladybird. But by how little is out there it at least seems wrong to write the guy off as downright hateful.
I hope it got to a point where trans people are comfortable contributing to the project.
Turns out Sumer Is Icumen In is an absolute banger.