You've got a good yard system, but I've got some suggestions:
In my freight days, we had both a receiving yard and a departure yard, and they would flank the bowl of the yard (your blue tracks) rather than being on the same side of the bowl.
You could move the rip track to that white section at the bottom of the yard lead, and then put in another track or two where the rip track is now. That could be your departure yard.
What you now call your arrival and departure tracks could be your receiving yard.
Or you could flip the purpose of these yards, depending on how easy it is to get a train in and out. But you definitely want your receiving yard on one side of the bowl, and your departure yard on the other.
As the Rip track is part of the mechanical department's domain, it likely would be away from the operations section of the yard.
