I think some persons are labouring under several misapprehensions. Just to make a few things clear:
1) "Conditional" PR means you will have all the rights and privileges currently enjoyed by PRs, in other words, to live, work and study in Canada without the need for additional permits and to enter and leave the country subject to the residency requirement BUT if your relationship with your sponsor breaks down (or purports to) within two years of your landing date, you status is revocable and you can be removed from the country. At the end of two years (or however long they decide to set it to) you and your spouse must apply JOINTLY for the removal of the conditional status, and you will be PR without conditions. This is essentially the same way it works in the US.
2) This change will NOT apply retroactively, BUT it will affect all cases/applications not completed by the time it comes into force.
3) NOT ALL applications/relationships will be affected. There was some discussion, although it is not mentioned in this article, that these new regulations would be applied to applications from couples who had been in a relationship for less than 2 years before applying for PR. So persons married/partnered for 3 or more years may find that they are not subject to conditional status.
4) The 5 or 7 year bar refers to the sponsored spouse not being able to sponsor a new spouse to Canada after being sponsored themselves until that time has elapsed. It does not apply to a sponsor being unable to sponsor a new spouse after breaking up with a previously sponsored spouse whose undertaking period is already completed.
I hope it's a good thing, I really do. For myself, I don't care, but having read so much about the blatant abuses the Canadian immigration system is subject to, I see it as just another case of the good suffering for the bad, and I am Jamaican, so I am inured to that now at my age.
I have no hopes that it will shorten the processing time, as I believe there are numerous other reasons (political and otherwise) for the widely varying processing times that have little to do with trying to flush out fraudsters and scammers.