If you look closely at this picture you can see the ledge that would be to the upper right of the oil pan pickup and would inhibit oil from easily flowing up the passenger side of the engine. Also visible is the metal hing piece on the obscured right side door.
By putting in doors left, forward, and right, of the pickup Paul has created a design that brings oil to the pickup when it’s needed and allows oil to refill the surge volume when it’s not. For example, when the car turns right, oil comes out of the left surge volume because the door opens, but can’t go into the right surge volume because that door is closed.
If you’re familiar with our oil pan you’ll note that there is a ledge all around the interior. This makes it harder for oil to slosh away from the pickup left, forward, and center. The issue of oil sloshing away from the pickup on turns has been discussed a lot, but my data shows that it can happen under braking too (this was a day that I was not running a quart high)
IMO, if cost was no object, the best possible solution would be the Metric Mechanic baffle (it does not add stack-height), the Paul Poore pan, and a beefy skid plate that would protect the pan.