A number of reports on Ukrainian forces abandoning defensive positions to take better position in Pokrovsk itself. There's also been evacuation of the areas and curfew on civilians who won't leave. I expect that the Russians will lay siege to it as per Mauriupol and let winter do the fighting for them.
Toretsk looks like it will fall too and probably soon.
Ukraine has to decide what to do with its forces from Kursk. Accept the weakened position in the east or hold on the north. Russia have gone with forcing the east and trying to contain Kursk which probably is the correct strategy and now places the ball back in Ukraine's court.
Unfortunately this looks like carrying on for a long time.
For Russians to take the bait and transfer more troops to Kursk, Ukrainians would need to threaten something meaningful (strategic) like serious push toward nuclear plant.
Of course that would also require for them to transfer even more troops there and even more weaken their already ailing Eastern front.
I guess Russian Command assessed situation not that critical, probably realizing Ukrainians don't have enough troops for serious push and satisfied themselves only to keep them at bay while simultaneously going all in at Pokrovsk. In short, Ukrainian push in Kursk opened chance for Russians in Donbas.
As you said ball is in Ukrainian court now, continue to try pushing in Kursk or try to stabilize situation in the East.