Until such time as circling approaches no longer exist for the routes flown by the airline, then the manoeuvre needs to be practiced.
My vote is with sheppey as the crews needs to feel confident to fly a visual circuit. They need to do it for their base training where aircraft flying is a requirement.
Yes a potentially greater threat than a normal day, potential errors will be mitigated by getting it right in the simulator in the first place (best you can) notwithstanding the limitations of the visual systems.