Have you ever listened to a surround sound track in Stereo? Because it’s awful, truly awful.
The problem is the tracks are balanced wrong – the center channel will be too low (dialog) and the FX and music will be WAY too high. No way around this – it’s truly the pits and I would not recommend it at all to anyone trying to listen to tracks from a movie.
At the very least you should try this out first on several of your films to see – many people think it’s actually intolerable to listen to surround sound mixed down to stereo (include me as one of them).