The season 4 thread has dried up and lost it's way recently - and I can see why.
Catching up on Episode 7 and Melissa has become a parody of supergirl. Been knocked down, can't quite get up again.
Katie is becoming more dominant in her role as a Luthor - stereotypical, I know, but the writers look like they are gonna push this with a lot more focus on Katie coming through from what could have been seen as a background role to the forerunner. The writers are probably thinking 'Yeah, yeah, Kara can do whatever, we've covered that' - Lena is the character to build on.
Katie could save this show. The writers are leaning towards her.
Only two-thirds through ep. 7. Just some thoughts.