ADCX Rob has effectively drawn what would be a reversing loop into your current design.
You have a lot of space for a good layout. Some tweeking and you will have something very enjoyable to operate for a long time. Running in loops gets old after while and going to 2 loops with sidings and staging with the return loop will bring a lot of operational satisfaction. Having a place to park and stage trains is an often over looked item which greatly enhances operations. Having the reversing loop that you can turn a whole train around with is often forgotten as well and eliminates many headaches.
Multiple continuous loops do allow you to run multiple trains at a time, set the throttle and let them go. But then what do you do after that? Blow the horn/whistle, watch the round and round? Having to adjust speeds, set to sidings while another train passes, running two trains on the same loop in the opposite direction, that brings some excitement, keeps you busy, and most of all is just plain fun to operate.
I say this because I have had the round and round layouts, no staging, no reversing loops, etc. I always lost interest in running trains quickly. It's even not exciting to watch for visitors.
