Kuro is streaming right now and he's saying that they knew for at least a month and to listen to what Matara and VShojo have to say.
Her notice saying that they parted ways in March makes me think its contractual disagreements and the negotiations finally fell through after two months.
It does sound like he's trying to be careful with what he's saying, but more because he doesn't want to step on anyone's toes than anything else. There is stuff that is "juicy" I think, but he says he wants Matara to be in control of what is out there.
More than anything he's emphasizing that nothing should change for fans and that he hopes people continue supporting their oshis regardless of branding.