From what I understand: It's primarily around the fact that Genspect is 'for' a wide range of people - including children.
And, should an org that's 'for' children, platform and be 'working' with people who say they have AGP. As this doesn't sit right at all from a safeguarding perspective. Boundaries, safeguarding etc.
(I say 'working' as I'm very hazy about what has happened there. One particular guy who is out as an agp attended the conference and was photographed in garb, but may have been at a social afterwards I read. But that's still uncomfortable/ inappropriate for a org supposedly working with/ for children.)
Obviously transwidows have been on the end of abuse by their agp ex's, many very severely so. They've done a lot with Debbie Hayton.
There was a twitter space which I heard quite a lot of and did agree with the criticism I heard from a safeguarding children's perspective. It was said that Genspect had been trying to advertise to schools in the past (I don't know if this is still the case or much about that, only what I heard there.) and I personally don't think that is appropriate.
I also think initially some detransitioners felt there wasn't enough representation from them this time.
There has been an insinuation that they believe in "true trans" as a result of platforming certain trans people which also has implications for children, but I'm not actually sure that's a fair assessment of their position.
Boyce has framed it as rad fems saying no one can be gender non conforming. (And as such are as bad as TRAs). But that's not what the issue is. James Lindsay has been a bit of an idiot on twitter there. Blames women for creating gender ideology.
Some seem to be saying all the above means that the document Genspect have created to challenge WPATH 8 that needs feedback on, is just WPATH version 2.
Unfortunately that document has been somewhat buried by everything that's been going on which is a shame as it it's both likely to be a million times better than WPATH and is asking for comments.