Very much liking a lot of elements on this layout.
Been thinking about the interchange: you might not be able to get it working as well as you'd like, but you could at least represent it and have it on the layout:

If you flopped the upper turnout over (green) and moved the buildings a little over (blue blocks), the BNSF interchange (red lines) could run behind the buildings and then off.
[Side note: I'm curious about the short runaround in the yellow circle. It's a bit small, so I wondered what specific car / operation it's used for]
Or, you could lose the upper right industry (or curve it well left) and put the interchange in at an angle:

But if you want it to be operational and feed in, you'd probably have to go against the wall, behind the buildings, moving everything over left a little.
Food for thought.
Looking forward to seeing your progress.