I hope Wallace keeps KF exploring her feelings like guilt and being empathetic to others. It may lead to something of substance.....maybe.
ETA: My current hope is that when the new Wells arrives, he'll accuse KF of being like the KF on his world who murdered people directly or helped to murder people. Of course, the team will defend her, particulary Cisco.
However, new Wells will continue to pester KF with questions about having helped anyone to an early grave or working for criminals. He'll make the team question the sanity of keeping her on the team. And he won't trust her, at least not for a long while.
I hope that triggers nightmares in KF of taking HR to Savitar, trying to help kill Iris, trying to murder Tracy Brand, freezing people's fingers and toes off, trying to murder Cisco and Barry, holding an icicle to Cecile's throat, etc. Perhaps she'll confess to Ralph, since he doesn't know because she lied to him S4, that she did help to murder a team Flash member. Perhaps then she'll realize that she needs to apologize, stop allowing the team to defend her, and attempt to make real amends. That would make me very happy.