It's due to at this time period Never Say Never Again was also released (with Blofeld) so this was a tiny shot at them.

Yeah. It's because of Shiva, and gettting her memories back that Cass becomes Batgirl again.

Still miss this series.

But it's also a struggle for Cass even in the current volume (as the one following the next arc has her grapple with finding out some more facts about her mom). It's a work in progress as Cass is still grappling with these emotions.

So it's because of the recent appearances of Shiva (not just this series). It starts in Batman & the Outsiders (2019) and continues on into Batman: Urban Legends (to a degree but Cass never sees her, she talks to Bruce) and then Batgirls.

Nah. Volume 1 when Steph breaks free of mind control with Cass who was trying to snap her out. There are two more volumes.