It could be. Bill C-71 doesn't change the criteria that are considered. It would only change the mandatory time frame within which they must be considered. One of those mandatory criteria is whether a person has been convicted of an offence during the commission of which violence against another person was used, threatened, or attempted. If there has been a conviction on a criminal offence that includes violence, that is triggered by the review.
Regarding the question about visiting by the police, when police visit a home and there is a question of threatened violence with a firearm, they provide to the chief firearms officer of the province what's called a firearms interest police report. That is brought to the attention of the chief firearms officer of the province so they can review whether the person is still eligible to hold a firearms licence.