I think the BBC built in reverb already properly places the instruments in the room.
I need to do more work on it. I have a lot of experimenting to do.
I want to test out delay times, like have a nearer thing be drier, but give it just a few milisecond longer delay than something farther away, i.e. if it's close to you, you'll hear it faster and the reverb will take longer to reach you, but then the ratio of the dry sound to the wet sound is also higher.
Then you can also think about distance to each ear drum.
I've got a lot of work to do on this once I realized that if I put everything at the same dryness/wetness (i.e. just putting a bunch of tracks under a reverb) then it's not going to sound as natural.