Your 11 degree switches are probably a better choice than getting new #4 switches since you will be backing in. Some longer cars may not like the sharper #4s.
The "caboose" tracks may not be that useful since you do not have a run around track, unless you keep a switcher in the lower left tracks.
As Chuck stated, if this is a staging or storage yard it is adequate. If you want to do more realistic yard movements you will need to add a few more features to make it usable. The issue with adding a yard lead and run around track is it will decrease the yard capacity. With the size of the area you have, you will have to decide what trade-offs you want to do.
