I have also noticed the Faking It/Chasing Life similarities. I posted this before the latest episode of Faking It - on the Chasing Life forum.
People who run programs can take it personal. I don't definitively know that is the case here but here are two things that catch my attention.
1. Faking It comes under heavy criticism for having female characters kissing each other for attention. The latest season of Chasing Life has Brenna, a character as with Amy who does not label herself and is attracted to both sexes - though unlike Amy she doesn't come across as a retcon, kissing her best female friend Ford. They are not attracted to each other. Brenna instead does this to please a man who she can't kiss due to health reasons. The kiss, which figured in promotions, is shown to be positive and the right thing to do. The next day at school Brenna and the man, Finn played by the same actor playing Felix in Faking It, are pleased when others congratulate Finn on such a wonderful thing happening. This really caught my eye. It was as if Chasing Life was saying when it comes down to it, it is really about men's desires being fulfilled by a woman even when it something like a same sex kiss between women. Is this a response to the anger towards Faking It?
2. There have been 4 lesbian characters on the 2nd season of Chasing Life. They travel the spectrum from stalking to psychopath. The latest was presented as being repulsed by women who date both men and women and was scolded by Brenna's male love interest Finn for being a bigot - Finn is shown as a perfect guy bravely fighting cancer while never saying or doing a wrong thing. He is a saint as with the straight male character Liam on Faking It. Will Felix on Faking It be the same? What we do know is lesbians, going by Chasing Life's 2nd season and Faking It are clingy, obsess over ex's, and are repulsed by women who show interest in men.
I also think there is something missing in the discussion when it comes to this issue. Most romances on network television and cable television are between a man and a woman. Television has long leaned heavily to having women who want a woman also be attracted to men. It is progressive that those women are not being labeled as lesbians who can't help liking a man or a straight woman on a fling as much as they used to be. Still people want to see romances they can relate to and when so many of the few women who like women on tv end up with a guy, it is lost visibility. When a character like Greer, a character beloved by fans and with an intense romantic chemistry with Brenna, on Chasing Life goes away so the program can get Brenna with a guy it makes sense the audience would be disappointed. The same goes with Amy after Reagan leaves - a certainty in my opinion - so they can hook Amy up with Felix. That this only seems to happen with women who like women on tv - bisexuality among men on tv is rarity and the term fluidity almost solely comes up only about women who like women - only adds to the disappointment. Biphobia is a problem but demonizing lesbian characters and not understanding the concern for visibility when it comes to romance between women does not help.
On the Chasing Life thread someone mentioned Degrassi. While that show is cheesy, it gets it. It comprehends visibility. It depicts bisexuality and pansexuality with a sharp eye. The guys running Chasing Life and Faking It could learn a lesson from that program.