I'm not sure that grades and scores were ever valued all that much by psychiatry programs. But yes, as more and more people have applied to psych, programs are probably having to find ways to differentiate the applicants. I'm not sure if programs are thinking about this, but at my school, I know of at least two people who made the switch to psych late in 3rd year for mainly lifestyle reasons. As psych become more competitive, they will want to see evidence of interest in and aptitude for the field. I think it is really helpful to have experience in the field, and to have psychiatrists as letter writers who are able to talk about your interest in and potential as a psychiatrist.