There are all kinds of potential abuse scenarios that apply to this change in the law. But there is no perfect solution to the problem of marriage fraud. However, since this is what we have now, it's important for both the sponsor and applicant to protect themselves from potential abuse in any form.
People are still going to try their hand at marriage fraud. This change won't end it. The exception to the 2 year rule is abuse. What kind of abuse? Physical? Mental? They don't define the type of abuse, just abuse. The 2 year rule can leave both the applicant and sponsor vulnerable. It's obvious why the applicant is vulnerable but the sponsor is vulnerable to untrue claims of abuse. The new stories we are going to hear about in the news are not of the sponsor being left a week after their spouse landed, but of having to face criminal charges for abuse. It's a catch 22 really. Before they were devastated because the spouse left them. Now their spouse leaves them and claims they were abused and the sponsor faces both criminal and immigration legal action. How do you handle that? I would recommend both parties keep a diary from the day of landing. Seriously. I don't care how in love you think you are or how well you think you know someone. Just do it to be on the safe side. Write about the good times and bad. Hopefully it's not something you will ever have to use to help prove that you didn't abuse your spouse and it's certainly not the only thing you will need to defend against this type of allegation. But it's something. I'd keep receipts from things you did together in it too, going to movies, taking trips, pics of being at the park.
Think about it this way. This is a useful tool for everyone. Couples who are genuine and never need to worry about charges of abuse can use the diary to help remove the conditions from their PR after 2 years. And it might be fun for them to create a memory book like that. So it works both ways. It can be a tool of protection or a tool to get rid of the red tape at the end of 2 years.
Better to be safe than sorry.