Looks rather efficient. Nice configuration.
One note of caution. IF, the wye is an Atlas #5 and IF, you will ever be running a rigid wheel base 4-4-4-4 PRR T-1 you very well may experience a tendency for the drivers to climb up the rail head.
The Atlas #5 wye does NOT offer the same safe run thru feature as the regular Atlas #5.
This is based on operating experience, not an opinion.