So a train arrives from the main and goes to the most bottom A/D track. How does the locomotive get from the front of the train out of that track and back to the round house? A switch engine cannot even get to that track to pull the train off without going onto the mains. I think that is a big problem. No way even to get the caboose off.
Even from the 2nd AD track the locomotive is "stuck" until a switcher works the train off the end.
I assume the track angling to the upper left below the turn table is the yard lead / drill track. It is not long enough compared to the length of the AD tracks. Especially considering the two items above.
If a train is working classifying an arrival there is no way for a 2nd set of locos to get to/from the AD tracks.
I see no RIP track, freight house, icing tracks, car shops, or passenger coach yard, commissary, etc.. I assume with a turntable like that you are modeling an era where passengers are a big deal.