Well, I'll be interested to see your ideas. The problem area is the yard. The only way I can see to lower the 4.0% and 4.4% grades there is by the yard tracks that go under the mainlines and/or reducing the clearance from 6.5". As near as I can tell, you need 1.5" to get down to 3.4%. I moved the passing sidings out of the way to make fiddling with the grades easier and here's what I've got so far. I lowered some of the yard tracks down 1.5" to see what that would do and got the 4.4% grade down, but that's certainly not recommended.
