Maybe?

Research shows that stop as yield doesn't increase cycling incidents (see states in the US where it's the law). The law only impacts those who follow it, and the harder/more annoying it is to follow the law (starting is hard on a bicycle), the less likely people are to follow it. For example, I see people jaywalking all the time in my area because crosswalks are rare, and jaywalking is rare downtown where there are plenty of crosswalks. So I think stop as yield has a very good chance of being a net positive.

At least I'm my area, drivers don't seem to be aware of the stop as yield law despite it being the law here, so I don't think we should expect much change in driving behavior.