You will find this has been requested before, but it's important enough to refresh, and like again.
I either use ETTR, or expose to ensure good detail in the highlights and sacrifice shadow detail. So I often deliberately end up with very pale or very dark images that are impossible to properly assess without being able to compensate for image brightness.
I have Fast Raw viewer set up as my editor in PM so I can quickly flip into it to adjust exposure and rate, but it would be far more convenient and faster to do this inside PM