Yay, I hope so too, and they kind of foreshadowed that she'll be around.
People really seemed to hammer Peyton in their reviews. That started to get to me a bit. To each their own opinion, but also I think that not liking how people behave sometimes, or seeing them in less flattering light, only helps to make them more human, realistic, and believable, (especially characters with six minutes of screen time per show).
*And for chrissakes,* she can only do with what gets written for her. Take the writers (and episode's Director too, for that matter) to task as much as the characters if you don't like what they're doing or how they're handled.
How many episode showed our main gang as flawed or less than ideal? The interaction between more believable INDIVIDUALS with their own personalities is much more intriguing to watch than seeing "personality-types" predictably filling in the blanks for each other in conversation.
I like how Peyton interacts with all the lab staff, with Danny, with Flack, with Sid and Hawkes especially, and most of all with Mac. PAC-Fan, more and more.