The new Gossip Girl, PLL Original Sin, and Sex Life have all been very well received so it won't surprise me if those all go to HBO as well. Let's not forget HBO has Euphoria so it's not like none of these shows match the same demographic as Euphoria.
Also the new PLL show is actually really damn good. I never watched the original nor will I but it's got the feel of a retro slasher film so I'm definitely interested to see it continue.
Our Flags Mean Death also got renewed prior to this news so I don't think they will take that back either.
The DC shows like Titans and Peacemaker will probably all just become HBO originals.