If the show had continued and the character kept around, they should've moved her past Barnabas (doesn't seem very likely though, does it?) and given her new connections. In order to keep the character on the show, that would've been needed, IMO. I have a hard time seeing her as a force of good, but with good writing and new development perhaps she could've become more of a gray area character that could've occasionally did good things/helped out.