Yes, a Judge can strike testimony but it might not even be necessary. I think if he does so, it will be because her testimony differs dramatically from what she told HIM at the hearing about the defense motion about the lack of a photo lineup.
His ruling hinged on her testimony. I have no idea what the Judge will decide but it seems a bit of a mess for the prosecution.
JMO
Maybe she talked about her testimony with so many people after the first trial that she filled in all sorts of blanks and now can't distinguish between memory and what she has discussed since the first trial. She seems confident in what she is saying today. Maybe she doesn't realize that she's going to be asked to explain how her testimony changed. In a way, I suppose this works in Jason's favor simply because her testimony can be discredited. The more she changes her story, the worse it may be for the prosecution.
Last time the defense questioning started with the first discussion she had with police and then went forward in time, demonstrating that each time she remembered less. This time, they may do the same thing and demonstrate that today she vividly remembers all sorts of new things.