"to include text messages and other communications of a sexual nature or for a sexual purpose, either from before or after the sexual activity in question."
They should call this Ghomeshi's law since it seems specifically designed to prevent the kind of evidence he had to protect himself. The judge in that case indicated the accusers had lied and Ghomeshi's emails/texts were all he had to prove that fact. How can communications before and after not be relevant to the question of guilt. 
Instead how about a statute of limitations that adult women must bring charges within one year of an event happening rather than waiting a decade or more and then springing it on a perhaps innocent man?