Oh no! She came back to see her best friend and ex, and wants to spend time with him, but her feelings are coming to the surface... what a terrible person! Shame!
If people are upset at Zoey for this it sounds like a them problem. The writing for Zoey has been really good thus far, and that's the whole point of her scenes so far is to cause tension. Her being back isn't going to ruin relationships (unless you want it to, via your own choices), it will certainly cause some drama, probably more on certain paths compared to others. However, she hasn't done anything inherently wrong thus far, and her character is serving it's purpose.
I guess if people choose to be upset over that, and dislike the character and/or blame DPC for this... well how about instead just be glad that we are getting this instead of
Acting Lessons 2.0.
*edit* I guess people just want zero drama in a game that has been pretty drama heavy, and just want boring plotlines... beats me.