If it could read multi channel audio files it would be a step in the right direction.
In Reaper I can save drum stems to any number of multichannel formats un/compressed, I can then load them into one track, cut, copy, paste, glue, time stretch.... I can also output the channels to surround.
I can split the channel to separate tracks like RealBand does with multichannel audio.
I can set it to stereo out and pan/vol adjust each individual drum by dragging the drum channel color, below I have the kick (light green).
Just need some way to get more control of RealDrums.

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Reasurround_Drums.png (145.73 KB, 37 downloads)
Reasurround_Drums_adjust.gif (307.59 KB, 36 downloads)