I'm going to take the opposite and unpopular view here, but I don't believe they will charge her with perjury. Yesterday on HLN the point was made by several people that her memory of which day she did the supposed searches could just be wrong. I think that's the way she can wiggle out of perjury charges. So now all she is doing is raising reasonable doubt.
I find it odd that at least 2 times on the stand, Cindy said that her memory is better today than it was 3 years ago. Her attorney also said on Nancy Grace (after Cindy testified she did the searches) that Cindy's memory is better today because of the medication change. That would be my argument.
However, I do not think they will prosecute her. I kind of feel like you - leave them alone, but I also think it gives a bad example - What is the point of having a trial? Everyone can lie. There are no consequences.