My opinion and suggestions:
1. Delete the two sidings in the lower right hand corner.
2. Drop the two ovals closer to the front so that you can add a switch to the right hand at the upper right corner of the outside oval.
3. Run the track off that switch up a gradual incline (closest to the top table edge) toward a reversing loop on an upper level in the lower left hand corner. Put your remaining switches in there for a small industrial area or storage.
4. Finally, move the left crossover at the bottom to the left side of the top two oval tracks to increase the length of the siding their use creates.
Now you can run reverse loop to reverse loop or loop-the-loop (round and round) as you choose with some variety planned into the fun. Also, consider narrowing the table on all sides slightly for better access to trouble spots.
Good luck,
Chuck
