The reason those plates are like that is because the original design had the shoulder straps crossing in the back. If you run the webbing naturally where it wants to go, as it leaves the plate you will see that each strap wants to go in and the natural way for them to go is to cross.
But the DIR guys didn’t like them crossed so they ran them straight, but they never changed the slot placement to allow for that. Then everyone else just copied the same design with the same slot placement thinking this was how it was supposed to be done. None of them looked at the wadding up of the webbing from trying to be forced to bend a way that it doesn’t like. If you look at any of hose plates with how the webbing comes out of the top slot it is tight as hell on one corner of the webbing and on the other nothing.
In order for them to be right for running the webbing straight, the two 45 degree slots need to be a lot closer in towards the middle.