I imagine the people in squads would still be in those squads. Vi, Rona and Wood all had their own teams and I can't see them deciding 'eh, well, Buffy slept with the enemy and made some bad choices, so we don't have to be Slayers anymore or do this job anymore, so let's all go join the circus.' They're not like that.
We saw that Leah is now part of Kennedy's team and I can't see Satsu turning her back on Slaying, so I'd think she was still part of the Japanese team? No sign of Rowena so far.
I don't think there's any sort of 'overlord' for the Slayers now, because, frankly, I don't think there's anyone who could do that job - Andrew can't do it, he doesn't have that kind of authority or presence or mindset to pull that off. Kennedy doesn't want the job. Buffy can't do the job. Spike can't do it, because Rona might actually kill him if he tried. Willow doesn't want it. Xander doesn't want it. Dawn's preoccupied. Giles is a child. Faith's too preoccupied with Angel and 'what to do now'. Angel can't do it and would be killed if he tried.
Wood, Connor and Gunn could maybe manage it, if they worked together with some of the Sunnydale girls, like Vi and Rona, but alone, they don't have the authority and the Slayers wouldn't trust them, despite their resumes.
I think, right now, the only person who could coordinate the Slayers into a cohesive unit would be Faith, with someone at her back, but she doesn't want it. Faith doesn't want to be a leader, she just wants to do what she does best, which is Slay and live her life on her own terms. Being a leader means she can't do that and she's not willing to bend.