All the people you call TRAs seem to have no problems with the new guidelines.
Where are you finding this please? I just see many toys being thrown out of pram. And mass transphobia accusations.
In many ways its positive because it means trans kids can should no longer feel pressurised to adopt gender stereotyoes to be recognised in their aquired gender.
Yes, of course it positive news! Kids should be able to have their own personalities and likes, without being told this means they are actually the opposite sex 
Veeeery interesting though, that your mind is straight to 'transkids' rather than..well kids in general. They were being pressured, however it was not from the 'side' you think, was the likes of Mermaids who were causing problems and making out stereotypes are anything bar stereotypes. That this seems to be getting sorted, its good news.
Its absolutely baffling that Mermaids were ever taken seriously with the jellybaby rubbish. So am extremely glad that to fit in with the guidance, they will have to be a bit more reasonable than they have been. Its good for GNC kids the country over, regardless of if they would have been one of the few who does grow up to be trans or not.
Also, even if TRAs were over the moon about this, I would still also be happy. As its the right decision. Not petty enough to say 'oh, the opposition likes it so I must hate it!' like so many seem to..