I understand the need for a possible second entrance, but I really like the big sweeping double track curves on the peninsula. The reversing nature of these curves, even with generous radii, will make for some interesting challenges and visual effects with long trains.
My biggest feedback would be to add a reversing loop to add operational interest. You should be able to fit one in with minimal changes. ( see my red line)
Other than that, I get the desire to have as many trains one the table as possible, but the yard area seems very busy to me. Lots of parallel tracks without visual break ups and lots of switches that will be hard to reach. Not sure how to approach that but it seems that you will spend more time looking at the tops of cars than enjoying moving trains along that wall.
