Eh, could be she retires from the field because of family reasons or something (barring something drastic happening).
Meh to "aging Batman" too much. Make the old fart 50+, and a grandpa to Dick's kids (if not Jason's as well by this point).Her running her own team works much better for me than intel for others, though, because it seems less like an unnecessary role created to fit her needs. But I enjoyed her at Batgirl in the old days (as well as as Oracle), and see no reason she shouldn't stay in the field. Just not as a de-aged Batgirl, not taken to an earlier, less-mature point in her life. New code name, and not de-aged would be my preference, but I just don't think they're going to let her and Dick be the ages they should be, that we saw them grow to. Ages Batman too much.
While short, Steph's run as Batgirl was pretty fun, and added her own element to it. Just like Cass did, and Babs before both. DC is known for its legacy characters, and DiDio can stuff it on that part.As for the second part - I want more people having their own codenames instead of re-using old ones (this especially applies to adult characters), and kinda thought Batgirl was a demotion for Steph (which I know no one agrees with, but I much preferred her as Spoiler, thematically speaking), and a bad message overall (yay - she gets validation from the people who treated her like crap). So if someone has to take it, then Cass, again with a mentor/student thing going on with Barbara.